10 Contoh Soal Efek Doppler

Assalammualaikum wr.wb.

Halo teman-teman apa kabar? semoga dalam keadaan sehat wal afiat. amin ya rabbal alamin. Pada kesempatan kali ini masharist.com akan membagikan tentang Contoh Soal Fisika, yaitu
Intensitas dan taraf intensitas bunyi serta Efek Doppler

Materi ini merupakan materi untuk siswa kelas XI. Semoga bermanfaat ya.

ii. Diketahui terdapat bunyi yang mempunyai intensitas 10⁻⁴ Westward/thou². Berapakah taraf intensitasnya dalam satuan desibel (dB) ?
a)20
b)30
c)40
d)fifty

Pembahasan

Diketahui :
I  = 1 10 x⁻⁴ W/m²
Io = one x 10⁻¹² Due west/m²

Ditanya : Taraf Intensitas (dB) ?

Jawaban :

TI = 10 log (I / Io)
TI = 10 log (10⁻⁴ / 10⁻¹²)
TI = 10 log (ten⁸)
TI = 10 (viii)
TI = eighty dB

Taraf intensitasnya dalam satuan desibel (dB) adalah 80 dB

three. Bunyi mempunyai intensitas one x ten^-9 W/m². Berapa taraf intensitasnya dalam satuan desibel (dB) ?
a)twenty
b)xxx
c)forty
d)50

Pembahasan

Diketahui :
I = 1 10 ten^-ix W/m2
Io =

10⁻¹² W/m²

Ditanya : Taraf Intensitas (dB) ?

Jawaban :

TI = x log (I / Io)
TI = 10 log (10^-9 / 10^-12)
TI = 10 log (10³)
TI = x (3)
TI = 30 dB

Taraf intensitasnya dalam satuan desibel (dB) adalah xxx dB

4. Taraf intensitas bunyi dalam suatu ruangan adalah 100 dB. Berapa intensitas bunyi dalam ruangan tersebut ?

…….10 10⁻² W/m²

a)1
b)2
c)3
d)4

Pembahasan

Diketahui :
TI = 100 dB
Io =

10⁻¹²
Due west/m^ii

Ditanya : Intensitas bunyi (I) dalam ruangan ?

Jawaban :

Taraf intensitas (TI) = 10 log I/I₀
㏒ (I / I₀) = TI / 10
I / I₀ = 10^(TI / 10)
I = I₀ [10^(TI / 10)]  = 10⁻¹² [10^(100 / 10)]  = ten⁻² Westward/m²

Intensitas bunyi dalam ruangan tersebut adalah i x 10⁻² W/m²

 5. Dua gelombang bunyi mempunyai intensitas 1 x

10⁻⁵
W/m2 dan


1 x 10⁻⁴ W/m². Perbedaan taraf intensitasnya dalam dB adalah…
a. 10 dB
b. xx dB
c. xxx dB
d. 40 dB
e. 50 dB

Pembahasan

Diketahui :
intensitas 1 (I₁) = i ten ten⁻⁵ Westward/k²
intensitas 2 (I₂) = 1 ten x⁻⁴ Westward/m²
taraf intensitas pendengaran (I₀) = ten⁻¹² W/1000²

Ditanya : Perbedaan taraf intensitas (TI) dalam dB ?

Jawaban :
Taraf intensitas (TI) = 10 log I/I₀
TI₁ = 10 log (10⁻⁵/10⁻¹²)
TI₁ = 10 log (10⁻⁵⁺¹²)
TI₁ = 10 log (10⁷)
TI₁ = 10 (7)
TI₁ = 70 dB

TI₂ = x log (10⁻⁴/10⁻¹²)
     = 10 log (10⁻⁴⁺¹²)
     = x log (10⁸)
     = 10 (viii)
TI₂ = eighty dB

Perbandingan intensitas kedua sumber bunyi :
I1 : I2
10^-11 : 10^-eight

vii. Diketahui terdapat dua buah gelombang bunyi mempunyai yang memiliki intensitas masing- masing ane x 10⁻⁷ Due west/m2 dan  ane x 10⁻⁴  W/m2. Perbedaan taraf intensitasnya dalam dB adalah…
a. x dB
b. twenty dB
c. xxx dB
d. 40 dB
east. 50 dB

Pembahasan

Diketahui :
intensitas 1 (I₁) = 1 x 10⁻⁷ West/m²
intensitas 2 (I₂) = 1 ten x⁻⁴ W/m²
taraf intensitas pendengaran (I₀) = 10⁻¹² W/m²

Ditanya : Perbedaan taraf intensitas (TI) dalam dB ?

Jawaban :
Taraf intensitas (TI) = 10 log I/I₀
TI₁ = 10 log (x⁻⁷/10⁻¹²)
TI₁ = ten log (x⁻⁷⁺¹²)
TI₁ = ten log (10⁵)
TI₁ = x (⁵)
TI₁ = 50 dB

TI₂ = 10 log (ten⁻⁴/ten⁻¹²)
     = 10 log (ten⁻⁴⁺¹²)
     = 10 log (10⁸)
     = 10 (8)
TI₂ = 80 dB

Perbedaan taraf intensitas = fourscore dB – 50 dB = xx dB

viii. Daya yang dihasilkan dari bunyi mesin Diesel pada jarak R sebesar 10π watt dan taraf intensitas bunyi yang didengar sebesar 70 dB. Jika intensitas ambang bunyi Io = 10⁻¹² W/g² maka hitunglah jarak R.
a.250 1000
b.500 grand
c.750 k
d.1000 m

Pembahasan

Diketahui :

P = 10π watt

TI = 70 dB
Io = 10⁻¹² W/chiliad²

Ditanya : jarak R ?

Jawaban :

Maka didapat jarak R adalah 500 meter.

nine. Sebuah sumber gelombang bunyi dengan daya 50 W memancarkan gelombang ke medium di sekelilingnya yang homogen. Tentukan intensitas radiasi gelombang tersebut pada jarak ten meter dari sumber …
A.0,04 Due west/thousand²
B.0,05 West/m²
C.0,06 W/m²
D.0,08 W/m²
E.0,01 W/chiliad²

Pembahasan

Diketahui :

P = 50 West
r = 10 meter
Io = 10⁻¹² W/1000²

Ditanya : intensitas radiasi gelombang (I) ?

Jawaban :

Intensitas bunyi pada jarak r
I = P / (4π r²)
I = 50 / (4π • 10²)
I = 1/(8π) ≈ 0,04 W/m²

Maka didapat intensitas radiasi gelombang (I) adalah 0,04 W/m²

ten. Jarak A ke sumber bunyi adalah three kali jarak B ke sumber bunyi. Intensitas bunyi yang di terima A dibandingkan dengan intensitas bunyi yang diterima B adalah

Pembahasan

Diketahui :

Ra = 3 Rb
Io = 10⁻¹² W/m²

Ditanya : perbandingan intensitas ?

Jawaban :

Ra = three Rb
Ia/ Ib = Rb^2 / Ra^2
Ia/Ib = Rb^2 / (3Rb)^2
Ia/Ib = rb^ii / 9Rb^2
Ia/Ib = one/nine

b.40 dB

c.l dB

d.60 dB

eastward.70 dB

Pembahasan

Diketahui :

R₁ = 3 one thousand
R₂ = 30 grand
TI₁ = 50 dB

Ditanya

TI₂ = ?

Jawaban :

12. Taraf intensitas sebuah mesin rata-rata 50 dB. Apabila 100 mesin dihidupkan bersamaan, maka taraf intensitasnya adalah …
A. xx dB
B. 50 dB
C. 70 dB
D. 75 dB
E. 150 dB

Pembahasan

Diketahui :

TI₁ = 50 dB
due north= 100

Ditanya :

TI₂ = ?

Jawaban :

Intensitas dan taraf intensitas bunyi serta Efek Doppler

Name :
CLASS :
Date :

1.Seratus buah sirine yang identik dibunyikan serentak menghasilkan taraf intensitas bunyi 60 dB. Jika intensitas ambang bunyi ten-12 W/m2 , maka besarnya intensitas sebuah sirine adalah ….
a)10^6 W/m2
b)10^7 Westward/m2
c)x^8 W/m2
d)10-8 W/m2
e)10-12 West/m2

2.Taraf intensitas satu ekor lebah yang berdengung adalah 10 dB. Jika bunyi dengung masing-masing lebah dianggap identik dan intensitas ambang pendengaran manusia 10-12 Wm-two maka intensitas bunyi dengung 1000 lebah adalah….
a)10-8 Wm-two
b)10-half-dozen Wm-2
c)10-5 Wm-2
d)ten-7 Wm-2
due east)10-4 Wm-2

3.Taraf intensitas suatu sumber bunyi pada jarak nine grand dari pengamat adalah 50 dB. Jika ditambah sembilan buah sumber bunyi identik yang dibunyikan bersamaan maka taraf intensitas total pada pengamat menjadi….
a)40 dB
b)5 dB
c)250 dB
d)500 dB
e)lx dB

4.Gelombang yang tidak memerlukan medium untuk merambat dinamakan…
a)gelombang elektromagnetik
b)gelombang longitudinal
c)gelombang berjalan
d)gelombang stationer
e)gelombang mekanik

5.Manakah yang merupakan sumber bunyi?
a)semua benda bisa menjadi sumber bunyi
b)tangan saat bertepuk tangan
c)tenggorokan ketika kita berbicara
d)dawai yang dipetik
e)meja yang dipukul atau diketuk

half dozen.Titik A dan B masing-masing berada pada jarak 4 m dan 9 1000 dari sebuah sumber bunyi. Jika IA dan IB masing-masing adalah intensitas bunyi di titik A dan titik B, maka IA : IB adalah
a)iv : 9
b)three : 2
c)16 : 81
d)81 : 16
e)9 : 4

7.Bunyi klakson sebuah sepeda motor saat dibunyikan menghasilkan taraf intensitas 40 dB, sedangkan bunyi klakson sebuah mobil saat dibunyikan menghasilkan taraf intensitas threescore dB. (Io = 10-12 Due west.chiliad-2). Jika 100 klakson sepeda motor dan ten klakson mobil serentak dibunyikan, maka perbandingan taraf intensitas sepeda motor dengan mobil adalah….
a)8 : 9
b)5 : half-dozen
c)9 : 10
d)7 : 8
e)half dozen : vii

8.Intensitas bunyi mesin jahit yang sedang bekerja adalah 10-nine Wm-ii. Untuk intensitas ambang bunyi 10-12Wm-two, maka taraf intensitas bunyi dari 10 mesin jahit identik yang sedang bekerja adalah …..
a)xxx dB
b)20 dB
c)300 dB
d)40 dB
due east)400 dB

nine.Taraf intensitas suatu sumber bunyi pada jarak 9 m dari pengamat adalah l dB. Jika ditambah sembilan buah sumber bunyi identik yang dibunyikan bersamaan maka taraf intensitas total pada pengamat menjadi….
a)threescore dB
b)5 dB
c)500 dB
d)40 dB
e)250 dB

10.Intensitas bunyi mesin jahit yang sedang bekerja adalah ten-9 Wm-two. Untuk intensitas ambang bunyi 10-12Wm-2, maka taraf intensitas bunyi dari 10 mesin jahit identik yang sedang bekerja adalah …..
a)300 dB
b)400 dB
c)thirty dB
d)40 dB
east)20 dB

11.Taraf intensitas satu ekor lebah yang berdengung adalah 10 dB. Jika bunyi dengung masing-masing lebah tersebut dianggap identik dan intensitas ambang pendengaran manusia 10-12 Wm-2 maka intensitas bunyi dengung one thousand lebah adalah

a)x-eight Wm-two
b)10-4 Wm-2
c)10-five Wm-ii
d)10-7 Wm-2
e)x-6 Wm-two

12.Bunyi klakson sebuah sepeda motor saat dibunyikan menghasilkan taraf intensitas 40 dB, sedangkan bunyi klakson sebuah mobil saat dibunyikan menghasilkan taraf intensitas 60 dB. (Io = 10-12 W.m-two). Jika 100 klakson sepeda motor dan x klakson mobil serentak dibunyikan, maka perbandingan taraf intensitas sepeda motor dengan mobil adalah….
a)six : seven
b)7 : 8
c)9 : ten
d)five : six
e)8 : 9

13.Seratus buah sirine yang identik dibunyikan serentak menghasilkan taraf intensitas bunyi 60 dB. Jika intensitas ambang bunyi 10-12 W/m2 , maka besarnya intensitas sebuah sirine adalah ….
a)x^7 W/m2
b)10^vi Westward/m2
c)10^viii W/m2
d)ten-8 W/m2
e)ten-12 West/m2

14.Intensitas bunyi mesin jahit yang sedang bekerja adalah 10-ix Wm-2. Untuk intensitas ambang bunyi 10-12 Wm-two, maka taraf intensitas bunyi dari 10 mesin jahit identik yang sedang bekerja adalah..
a)300 dB
b)400 dB
c)30 dB
d)20 dB
e)40 dB

15.Taraf intensitas bunyi pada sebuah titik yang ditimbulkan oleh sebuah sumber bunyi berbanding langsung dengan…
a)kebalikan intensitas bunyi di titik itu
b)kebalikan dari logaritma intensitas di titik itu
c)logaritma perbandingan antara intensitas bunyi dan intensitas ambang bunyi
d)intensitas ambang bunyi
e)intensitas bunyi di titik itu

16.Semakin bertambah jarak antara sumber suara dan pendengar maka intensitas bunyi semakin besar
a)Salah
b)Benar

17.Jarak seorang pengamat A ke sumber gempa dua kali jarak pengamat B ke sumber gempa. Apabila intensitas gempa di pengamat B 8,2 x ten^four W.k-ii , berarti intensitas gempa di A sebesar ….
a)eight,twenty .10^4 W.chiliad-2
b)two,05 . ten^4 W.thou-ii
c)four,10 . 10^iv W.thousand-2
d)2,00 . x^v W.m-2
east)1,64 . x^v West.m-2

18.Jarak seorang pengamat A ke sumber gempa dua kali jarak pengamat B ke sumber gempa. Apabila intensitas gempa di pengamat B 8,2 x 10^4 W.m-2 , berarti intensitas gempa di A sebesar ….
a)iv,x . 10^four W.one thousand-2
b)8,20 .10^4 W.thousand-2
c)1,64 . x^5 West.m-2
d)2,00 . ten^five Westward.grand-two
eastward)2,05 . 10^4 Due west.m-2

19.Bunyi klakson sebuah sepeda motor saat dibunyikan menghasilkan taraf intensitas forty dB, sedangkan bunyi klakson sebuah mobil saat dibunyikan menghasilkan taraf intensitas lx dB (Io = ten-12 West k-2 ). Jika 100 klakson sepeda motor dan 10 klakson mobil serentak dibunyikan, maka perbandingan taraf intensitas sepeda motor dengan mobil adalah .
a)5 : 6
b)7 : 8
c)nine : x
d)6 : 7
eastward)viii : nine

xx.Alat untuk mengukur taraf intensitas bunyi diukur oleh…
a)Desibelmeter
b)Barometer
c)Soundmeter
d)Hidrometer
e)Manometer

21.Taraf intensitas bunyi dalam suatu ruangan adalah 100 dB. Berapa intensitas bunyi dalam ruangan tersebut ? …..x ten-two W/m2.
a)2
b)4
c)3
d)one

22.Bunyi mempunyai intensitas 1 x 10-9 W/m2. Berapa taraf intensitasnya dalam satuan desibel (dB) ?
a)xl
b)20
c)30
d)50

23.Daya yang dihasilkan dari bunyi mesin Diesel pada jarak R sebesar 10p watt dan taraf intensitas bunyi yang didengar sebesar lxx dB. Jika intensitas ambang bunyi Io = 10-12 Wm2 maka hitunglah jarak R.
a)thousand m
b)250 m
c)750 grand
d)500 yard

24.Hitunglah taraf intensitas sumber bunyi yang memiliki intensitas I = x-five watt/m2 jika intensitas ambang I0 = 10-12 watt/m2.
a)70 dB
b)50 dB
c)fourscore dB
d)60 dB

25.Daya yang dihasilkan dari bunyi mesin Diesel pada jarak R sebesar 10p watt dan taraf intensitas bunyi yang didengar sebesar 70 dB. Jika intensitas ambang bunyi Io = x-12 Wm2 maka hitunglah jarak R.
a)500 m
b)250 m
c)1000 one thousand
d)750 m

26.Sebuah mesin mobil menghasilkan taraf intensitas bunyi TI = seventy dB (Io = x-12 watt/m2). Agar suara mesin mobil menghasilkan taraf intensitas yang setara dengan suara sirine mobil ambulans, maka berapakah jumlah mesin mobil yang diperlukan.
a)twoscore
b)30
c)20
d)10

27.Suatu sumber bunyi mempunyai taraf intensitas 50 dB pada jarak 9 m dari pengamat. Bila ditambahkan nine buah sumber bunyi identik yang dibunyikan bersamaan, hitunglah taraf intensitas bunyi yang didengar pengamat.
a)twoscore dB
b)threescore dB
c)xx dB
d)lxxx dB

28.Pada jarak 1,5 meter dari sumber ledakan terdengar bunyi dengan taraf intensitas xc dB. Berapa taraf intensitas bunyi yang terdengar pada jarak 150 m dari sumber …
a)50 dB
b)eighty dB
c)70 dB
d)100 dB
e)150 dB

29.Sumber bunyi dan pendengar bergerak saling mendekati dengan kecepatan yang sama yaitu 20 thousand/s. Jika pendengar mendengar bunyi dari sumber dengan frekuensi 720 Hz dan cepat rambat bunyi di udara saat itu 340 m/due south, maka frekuensi sumber yang sebenarnya dalah…
a)540 Hz
b)640 Hz
c)320 Hz
d)270 Hz
e)200 Hz

30.Sebuah sumber bunyi frekuensi 680Hz bergerak dengan kecepatan 20m/south menjauhi pendengaran yang diam, didekat pendengar terdapat sumber bunyi lain yang memancarkan bunyi frekuensi 644Hz. Jika cepat rambat bunyi di udara 320m/south, maka frekuensi pelayangan bunyi yang diterima pendengar adalah …
a)four Hz
b)5 Hz
c)2 Hz
d)6 Hz
east)3 Hz

31.Sumber bunyi dengan frekuensi 1400 Hz mengikuti pendengar yang menjauhinya. Jika kecepatan pendengar 100 thou/s, kecepatan sumber bunyi 60 m/s, dan cepat rambat bunyi saat itu 340 m/south, maka frekuensi bunyi yang diterima oleh pendengar adalah ….
a)600 Hz
b)900 Hz
c)800 Hz
d)1200 Hz
e)chiliad Hz

32.Sebuah jendela dengan ukuran  2m x 3m dilewati bunyi dengan daya akustik  0,half-dozen Due west . Apabila intensitas ambang   10-sixteen Westward.cm-ii  , taraf intensitas yang  terjadi pada jendela tersebut adalah…
a)300 dB
b)120 dB
c)150 dB
d)lx dB
eastward)110 dB

33.Sebuah sumber bunyi mempunyai taraf intensitas 17 dB. Jika terdapat ten benda dengan taraf intensitas yang sama, kemudian berbunyi secara serentak, maka taraf intensitas total yang dihasilkan adalah ….
a)27 dB
b)15 dB
c)30 dB
d)xx dB
east)25 dB

34.Taraf intensitas pada suatu jendela yang disebabkan oleh suara bising di jalan raya adalah 80 dB. Daya bunyi yang memasuki jendela dengan ukuran jendela ane,ii m 10 1 k adalah …
a)2,8x x-iv Watt
b)1,2 10 ten-4 Watt
c)2,2x 10-4 Watt
d)three,2x 10-iv Watt
e)one,half-dozen x x-4 Watt

35.Seekor kelelawar terbang menuju buah mangga yang sudah masak di atas pohon. Untu memastikan posisi buah tersebut, sang kelelawar memancarkan gelombang ultrasonik berfrekuensi 24 kHz. Jika kecepatan terbang kelelawar 20 m/s dan cepat rambat bunyi saat itu 340 one thousand/south, maka frekuensi pantul dari buah mangga yang diterima kelelawar adalah …
a)25 kHz
b)20 kHz
c)xv kHz
d)27 kHz
e)22 kHz

36.Jika sebuah mesin taraf intensitasnya 20 dB, maka saat taraf intensitasnya menjadi 30 dB banyaknya mesin yang sejenis sedang menyala adalah …
a)3 buah
b)20 buah
c)5 buah
d)30 buah
east)10 buah

37.Taraf intensitas suatu mesin adalah 50 db dan taraf intensitas halilintar adalah lxxx db, maka perbandingan intensitas bunyi halilintar dengan mesin adalah
a)500 : 1
b)200 : one
c)100 :1
d)1000 : 1
e)900 : one

Answer Cardinal
1.d
2.a
3.e
4.a
5.a
6.d
vii.e
8.d
ix.a
10.d
11.a
12.a
13.d
14.e
15.d
16.a
17.b
18.east
nineteen.d
20.a

21.d
22.c
23.d
24.a
25.a
26.b
27.b

28.a
29.b
30.a
31.d
32.e
33.a
34.b
35.d
36.e
37.d

Inspired by
https://quizizz.com/admin/quiz/5e809ae5382421001dc0f5aa/efek-doppler-dan-taraf-intensitas-bunyi
https://quizizz.com/admin/quiz/5e78325ccbef1e001bd820ee/intensitas-dan-taraf-intensitas-bunyi
https://quizizz.com/admin/quiz/5c9eb7bd1c3dda001bcca014/intensitas-bunyi

English VERSION

Assalammualaikum wr.wb.

Hello friends how are you? hope you lot are in expert health. amen ya rabbal alamin. On this occasion, masharist.com will share about Examples of Physics Problems, namely the intensity and level of audio intensity and the Doppler Event

This textile is material for form Xi students. Hopefully, it’s useful.

Sound intensity and level and Doppler Effect

37 Examples of Intensity and Sound Intensity Questions and the Doppler Effect

and the answer. Complete. Image by Albrecht Fietz from Pixabay

Drove of Sample Problems and Discussion of Sound Intensity and Levels

1. Sound has an intensity of 1 x 10⁻⁵ W/k². What is the intensity level in decibels (dB)?

a)l

b)60

c)70

d)80

Discussion

Is known :

I = 1 x 10⁻⁵ Westward/m2

Io = 1 x x^-12 W/m2

Wanted : Level of Intensity (dB) ?

Answer:

TI = 10 logs (I/Io)

TI = ten logs (10⁻⁵/ 10^-12)

TI = ten logs (10⁷)

IT = 10 (7)

TI = 70 dB

The intensity level in decibels (dB) is 70 dB

It is known that a audio has an intensity of 10⁻⁴ Due west/one thousand². What is the intensity level in decibels (dB)?

a)20

b)xxx

c)forty

d)l

Discussion

Is known :

I = 1 10 10⁻⁴ W/chiliad²

Io = 1 x 10⁻¹² W/m²

Wanted : Level of Intensity (dB) ?

Answer:

TI = 10 logs (I/Io)

TI = 10 logs (10⁻⁴ / x⁻¹²)

TI = x logs (ten⁸)

TI = ten (viii)

TI = 80 dB

The intensity level in decibels (dB) is 80 dB

iii. Sound has an intensity of 1 ten 10^-9 W/thou². What is the intensity level in decibels (dB)?

a)xx

b)thirty

c)40

d)50

Discussion

Is known :

I = 1 x 10^-9 W/m2

Io = 10⁻¹² W/one thousand²

Wanted : Level of Intensity (dB) ?

Respond:

TI = ten logs (I/Io)

TI = 10 logs (10^-9 / 10^-12)

TI = x logs (ten³)

Information technology = ten (3)

TI = 30 dB

The level of intensity in decibels (dB) is 30 dB

iv. The level of sound intensity in a room is 100 dB. What is the intensity of the audio in the room? …….x 10⁻² W/thou²

a)1

b)2

c)3

d)4

Discussion

Is known :

TI = 100 dB

Io = 10⁻¹² W/m^ii

Wanted: Sound intensity (I) in the room?

Answer:

Intensity level (TI) = 10 log I/I₀

(I/I₀) = TI/ten

I / I₀ = 10^(TI / ten)

I = I₀ [x^(TI / 10)]

  = x⁻¹² [10^(100 / 10)]

  = 10⁻² West/m²

The sound intensity in the room is i x ten⁻² W/m²

5. Two sound waves have an intensity of 1 x ten⁻⁵ W/m2 and i x 10⁻⁴ West/m². The departure in intensity level in dB is…

a. 10 dB

b. twenty dB

c. xxx dB

d. forty dB

east. 50 dB

Give-and-take

Is known :

intensity 1 (I₁) = 1 x 10⁻⁵ W/g²

intensity two (I₂) = 1 x x⁻⁴ W/m²

hearing intensity level (I₀) = 10⁻¹² W/chiliad²

Wanted: The deviation in intensity level (TI) in dB?

Respond:

Intensity level (TI) = 10 log I/I₀

TI₁ = 10 logs (x⁻⁵/10⁻¹²)

TI₁ = 10 logs (10⁻⁵⁺¹²)

TI₁ = 10 logs (ten⁷)

TI₁ = 10 (seven)

TI₁ = lxx dB

TI₂ = 10 logs (ten⁻⁴/ten⁻¹²)

     = 10 logs (10⁻⁴⁺¹²)

     = 10 logs (10⁸)

     = 10 (8)

TI₂ = lxxx dB

The departure in intensity level = eighty dB – 70 dB = x dB

6. Determine the ratio of the intensities of two sounds whose intensity levels are x dB and forty dB.

Discussion

Is known :

TI1 = ten dB

TI2 = 40 dB

Io = x⁻¹² W/m²

Wanted: Comparing of the intensity of the two sounds (I1: I2)?

Answer:

Comparison of the intensity of the ii sound sources:

I1: I2

ten^-eleven: 10^-viii

vii. It is known that 2 audio waves are having an intensity of 1 x 10⁻⁷ Due west/m2 and 1 x ten⁻⁴ W/m2, respectively. The deviation in intensity level in dB is…

a. 10 dB

b. twenty dB

c. xxx dB

d. 40 dB

e. 50 dB

Discussion

Is known :

intensity i (I₁) = 1 x 10⁻⁷ W/m²

intensity 2 (I₂) = 1 x 10⁻⁴ Westward/1000²

hearing intensity level (I₀) = ten⁻¹² Due west/grand²

Wanted: The departure in intensity level (TI) in dB?

Answer:

Intensity level (TI) = 10 log I/I₀

TI₁ = ten logs (10⁻⁷/ten⁻¹²)

TI₁ = 10 logs (10⁻⁷⁺¹²)

TI₁ = 10 logs (10⁵)

TI₁ = ten (⁵)

TI₁ = l dB

TI₂ = ten logs (10⁻⁴/ten⁻¹²)

     = ten logs (10⁻⁴⁺¹²)

     = 10 logs (ten⁸)

     = ten (8)

TI₂ = 80 dB

The deviation in intensity level = fourscore dB – fifty dB = 20 dB

eight. The power generated from the audio of the Diesel engine at a distance of R is 10π watts and the intensity level of the sound heard is 70 dB. If the threshold intensity of audio Io = 10⁻¹² W/m² so calculates the altitude R.

a.250 m

b.500 m

c.750 m

d.m m

Discussion

Is known :

P = 10π watts

TI = 70 dB

Io = 10⁻¹² West/k²

Wanted : distance R ?

Respond:

And so the distance R is 500 meters.

nine. A sound wave source with a ability of 50 West radiates waves into a homogeneous surrounding medium. Determine the radiation intensity of the wave at a distance of ten meters from the source…

A.0.04 W/chiliad²

B.0.05 W/m²

C.0.06 Westward/g²

D.0.08 West/m²

E.0.01 W/yard²

Discussion

Is known :

P = 50 W

r = 10 meters

Io = ten⁻¹² W/m²

Wanted: intensity of radiation moving ridge (I)?

Answer:

Sound intensity at distance r

I = P / (4π r²)

I = 50 / (4π • 10²)

I = one/(8π) 0.04 W/m²

Then the radiations intensity of the wave (I) is 0.04 W/one thousand²

10. The distance from A to the sound source is three times the distance from B to the sound source. The intensity of the sound received past A is compared to the intensity of the sound received by B is

Word

Is known:

Ra = three Rb

Io = 10⁻¹² W/m²

Wanted: intensity comparing?

Answer:

Ra = 3 Rb

Ia/ Ib = Rb^two / Ra^2

Ia/Ib = Rb^ii / (3Rb)^2

Ia/Ib = rb^ii / 9Rb^two

Ia/Ib = 1/9

So the comparison of the intensity received by a and b is a one: 9

11. If a sound is heard at a altitude of 3 m from the source of the explosion with an intensity level of 50 dB, then at a distance of 30 1000 from the source of the explosion, a sound with an intensity level will exist heard.

a.30 dB

b.twoscore dB

c.fifty dB

d.60 dB

eastward.seventy dB

Discussion

Is known :

R₁ = iii m

R₂ = thirty thou

TI₁ = 50 dB

Asked

TI₂ = ?

Answer:

12. The intensity level of an average machine is l dB. If 100 machines are started at the same time, then the intensity level is…

A. 20 dB

B. 50 dB

C. 70 dB

D. 75 dB

E. 150 dB

Discussion

Is known :

TI₁ = fifty dB

n= 100

Asked:

TI₂ =?

Reply:

Audio intensity and level and Doppler Effect

NAME :

Class :

DATES :

i. One hundred identical sirens sounded simultaneous to produce a sound intensity level of lx dB. If the threshold intensity of sound is 10-12 Westward/m2, then the intensity of a siren is…

a)10^6 W/m2

b)10^7 West/m2

c)10^8 W/m2

d)10-eight W/m2

e)x-12 W/m2

2. The intensity level of a buzzing bee is 10 dB. If the buzzing audio of each bee is considered identical and the intensity of the human hearing threshold is 10-12 Wm-2, then the intensity of the buzzing sound of chiliad bees is…

a)10-viii Wm-ii

b)x-6 Wm-two

c)ten-5 Wm-2

d)ten-7 Wm-2

e)10-4 Wm-ii

3. The intensity level of a sound source at a distance of 9 m from the observer is 50 dB. If nine identical sound sources are added together, the total intensity level for the observer becomes…

a)40 dB

b)v dB

c)250 dB

d)500 dB

e)threescore dB

A moving ridge that does non crave a medium to propagate is chosen…

a) electromagnetic waves

b)longitudinal wave

c) traveling waves

d) stationary wave

eastward) mechanical waves

5. Which is the source of the sound?

a) all objects can be a source of sound

b) hands when clapping

c) pharynx when we talk

d) plucked strings

e) the tabular array being hitting or knocked

half-dozen.Points A and B are located at a distance of 4 m and 9 grand from a sound source, respectively. If IA and IB are the sound intensities at point A and betoken B, respectively, and then IA: IB is

a)4: 9

b)3: 2

c)16: 81

d)81: 16

e)9: 4

vii. The sound of a motorcycle horn when sounded produces an intensity level of 40 dB, while the sound of a car horn when sounded produces an intensity level of sixty dB. (Io = 10-12 Westward.thou-2). If 100 motorbike horns and ten machine horns are sounded simultaneously, then the ratio of the intensity level of a motorbike to a car is…

a)viii: 9

b)5: six

c)9: 10

d)7: viii

e)half-dozen: seven

viii. The sound intensity of the sewing auto running is 10-9 Wm-ii. For the sound intensity threshold of 10-12Wm-ii, the sound intensity level of 10 identical sewing machines that are working is …..

a)30 dB

b)20 dB

c)300 dB

d)40 dB

eastward)400 dB

nine. The intensity level of a sound source at a distance of 9 m from the observer is 50 dB. If nine identical sound sources are added together, the full intensity level for the observer becomes…

a)lx dB

b)5 dB

c) 500 dB

d)forty dB

e)250 dB

x. The sound intensity of the sewing machine running is 10-9 Wm-ii. For the sound intensity threshold of ten-12Wm-2, the audio intensity level of x identical sewing machines that are working is …..

a)300 dB

b)400 dB

c)thirty dB

d)40 dB

eastward)20 dB

11. The intensity level of a buzzing bee is x dB. If the buzzing sound of each bee is considered identical and the intensity of the human hearing threshold is 10-12 Wm-2, then the intensity of the buzzing sound of one thousand bees is

a)x-8 Wm-2

b)10-4 Wm-two

c)ten-5 Wm-2

d)10-seven Wm-2

e)10-half-dozen Wm-2

12. The sound of a motorcycle horn when sounded produces an intensity level of 40 dB, while the sound of a car horn when sounded produces an intensity level of lx dB. (Io = 10-12 W.m-2). If 100 motorcycle horns and 10 car horns are sounded simultaneously, then the ratio of the intensity level of a motorcycle to a motorcar is…

a)6: 7

b)7: 8

c)9: 10

d)5: 6

eastward)eight: 9

xiii. One hundred identical sirens sounded simultaneous to produce a sound intensity level of 60 dB. If the threshold intensity of sound is 10-12 Westward/m2, then the intensity of a siren is…

a)10^7 Due west/m2

b)x^half dozen W/m2

c)10^8 W/m2

d)10-8 W/m2

e)x-12 W/m2

xiv. The sound intensity of the sewing automobile running is 10-nine Wm-ii. For the audio intensity threshold of 10-12 Wm-2, the audio intensity level of x identical sewing machines that are working is…

a)300 dB

b)400 dB

c)30 dB

d)20 dB

due east)40 dB

15. The level of sound intensity at a point caused by a sound source is directly proportional to…

a) the changed of the sound intensity at that signal

b) the reciprocal of the logarithm of the intensity at that signal

c) the logarithm of the ratio betwixt the sound intensity and the threshold intensity of the audio

d) threshold intensity of sound

e) the intensity of the audio at that signal

16. The greater the distance between the sound source and the listener, the higher the sound intensity

a) False

b)Right

17. The distance of observer A to the source of the convulsion is twice the distance of observer B to the source of the earthquake. If the intensity of the earthquake at observer B is 8.two 10 x^4 West.thou-2, it ways that the intensity of the convulsion at A is…

a)8,20 .10^4 W.m-2

b)2.05 . ten^4 W.m-2

c)4,10 . ten^4 W.thou-2

d)2.00 . x^5 W.m-2

eastward)1,64 . 10^5 W.m-2

18. The altitude of observer A to the source of the convulsion is twice the distance of observer B to the source of the earthquake. If the intensity of the earthquake at observer B is viii.two x x^four West.one thousand-2, it means that the intensity of the convulsion at A is…

a)4,10 . 10^4 West.m-ii

b)8,20 .10^4 W.m-2

c)i,64 . ten^5 Westward.m-2

d)two.00 . 10^5 W.m-ii

e)2.05 . x^4 West.m-2

nineteen. The audio of a motorcycle horn when sounded produces an intensity level of 40 dB, while the audio of a machine horn when sounded produces an intensity level of 60 dB (Io = 10-12 W m-ii ). If 100 motorbike horns and 10 car horns are sounded simultaneously, then the ratio of the intensity level of a motorcycle to a car is.

a)5: 6

b)7: viii

c)ix: 10

d)6: vii

eastward)8: ix

20. An musical instrument for measuring the level of sound intensity is measured by…

a) Decibelmeter

b)Barometer

c) Sound meter

d) Hydrometer

e)Manometer

21. The sound intensity level in a room is 100 dB. What is the intensity of the sound in the room? …..10 10-2 Westward/m2.

a)two

b)four

c)3

d)1

22. Sound has an intensity of one x ten-9 W/m2. What is the intensity level in decibels (dB)?

a)40

b)20

c)30

d)fifty

23. The ability generated from the sound of the Diesel fuel engine at a distance of R is 10p watts and the intensity level of the sound heard is 70 dB. If the threshold intensity of sound Io = 10-12 Wm2 then calculates the distance R.

a)1000 m

b)250 grand

c)750 m

d)500 k

24. Calculate the intensity level of a sound source that has an intensity of I = 10-five watts/m2 if the threshold intensity I0 = 10-12 watts/m2.

a)lxx dB

b)l dB

c)80 dB

d)60 dB

25. The power generated from the sound of the Diesel fuel engine at a distance of R is 10p watts and the intensity level of the sound heard is 70 dB. If the threshold intensity of sound Io = 10-12 Wm2 then calculates the distance R.

a)500 m

b)250 m

c)1000 m

d)750 m

26.A car engine produces a audio intensity level TI = 70 dB (Io = 10-12 watts/m2). For the sound of a car, an engine to produce an intensity level equivalent to the sound of an ambulance siren, how many car engines are needed.

a)40

b)30

c)20

d)10

27. A sound source has an intensity level of 50 dB at a altitude of 9 m from the observer. If ix identical sound sources are added together, calculate the intensity level of the audio heard by the observer.

a)40 dB

b)sixty dB

c)20 dB

d)80 dB

28. At a distance of 1.5 meters from the source of the explosion a sound with an intensity level of 90 dB was heard. What is the intensity level of the sound heard at a distance of 150 yard from the source?

a)50 dB

b)80 dB

c)70 dB

d)100 dB

eastward)150 dB

29. The source of the sound and the listener are moving toward each other at the same speed of twenty m/due south. If the listener hears the sound from a source with a frequency of 720 Hz and the speed of sound in air at that time is 340 thousand/south, then the bodily source frequency is…

a)540 Hz

b)640 Hz

c)320 Hz

d)270 Hz

e)200 Hz

30. A sound source with a frequency of 680 Hz is moving at a speed of xx k/s abroad from a stationary ear, near the listener is another sound source emitting a sound of frequency 644 Hz. If the speed of sound in air is 320 chiliad/s, then the frequency of the sound received by the listener is…

a)iv Hz

b)five Hz

c)2 Hz

d)half-dozen Hz

e)3 Hz

31. A sound source with a frequency of 1400 Hz follows the listener away from it. If the speed of the listener is 100 m/south, the speed of the source of sound is 60 m/s, and the speed of audio is 340 grand/s, then the frequency of the audio received by the listener is…

a)600 Hz

b)900 Hz

c)800 Hz

d)1200 Hz

e)thou Hz

32. A window measuring 2 m x 3 k passes sound with an acoustic power of 0.half-dozen W. If the threshold intensity is 10-16 Westward.cm-2, the intensity level that occurs in the window is…

a)300 dB

b)120 dB

c)150 dB

d)60 dB

e)110 dB

33. A sound source has an intensity level of 17 dB. If there are 10 objects with the same intensity level, and then audio simultaneous, and then the resulting total intensity level is…

a)27 dB

b)fifteen dB

c)thirty dB

d)20 dB

due east)25 dB

34. The intensity level of a window caused by racket on the highway is 80 dB. The ability of sound entering a window with a window size of 1.ii m x 1 1000 is…

a)2.8x 10-four Watt

b)1.2 x 10-4 Watt

c)2.2x 10-four Watt

d)three.2x 10-4 Watt

e)ane.6 ten 10-four Watt

35. A bat flies towards a ripe mango on a tree. To ostend the position of the fruit, the bat emits ultrasonic waves with a frequency of 24 kHz. If the flying speed of the bat is 20 one thousand/s and the speed of audio is 340 m/s, then the frequency of the mango fruit that the bat receives is…

a)25 kHz

b)20kHz

c)15kHz

d)27 kHz

e)22 kHz

36. If an engine has an intensity level of twenty dB, then when the intensity level becomes thirty dB, the number of similar machines running is…

a) three pieces

b)20 pieces

c) five pieces

d)30 pieces

e)10fruit

37. The intensity level of a machine is l dB and the intensity level of lightning is eighty dB, then the ratio of the intensity of the sound of lightning to the machine is

a)500: i

b)200: i

c)100:1

d)thousand: i

due east)900: i

Answer Key

1.d

two.a

three.due east

iv.a

5.a

6.d

7.e

viii.d

9.a

x.d

11.a

12.a

13.d

14.eastward

fifteen.d

xvi.a

17.b

18.e

19.d

xx.a

21.d

22.c

23.d

24.a

25.a

26.b

27.b

28.a

29.b

thirty.a

31.d

32.e

33.a

34.b

35.d

36.e

37.d

Inspired past

https://quizizz.com/admin/quiz/5e809ae5382421001dc0f5aa/effects-doppler-dan-taraf-intensitas-bunyi

https://quizizz.com/admin/quiz/5e78325ccbef1e001bd820ee/intensitas-dan-taraf-intensitas-bunyi

https://quizizz.com/admin/quiz/5c9eb7bd1c3dda001bcca014/intensitas-bunyi