Soal Intensitas Bunyi

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.

2. Diketahui terdapat bunyi yang mempunyai intensitas 10⁻⁴ Westward/m². Berapakah taraf intensitasnya dalam satuan desibel (dB) ?
a)twenty
b)thirty
c)40
d)50

Pembahasan

Diketahui :
I  = one x 10⁻⁴ W/1000²
Io = ane x ten⁻¹² W/m²

Ditanya : Taraf Intensitas (dB) ?

Jawaban :

TI = ten log (I / Io)
TI = x log (x⁻⁴ / 10⁻¹²)
TI = x log (ten⁸)
TI = 10 (8)
TI = fourscore dB

Taraf intensitasnya dalam satuan desibel (dB) adalah lxxx dB

three. Bunyi mempunyai intensitas 1 x x^-9 W/one thousand². Berapa taraf intensitasnya dalam satuan desibel (dB) ?
a)20
b)xxx
c)40
d)50

Pembahasan

Diketahui :
I = one x 10^-9 Due west/m2
Io =

x⁻¹² W/m²

Ditanya : Taraf Intensitas (dB) ?

Jawaban :

TI = x log (I / Io)
TI = ten log (10^-ix / 10^-12)
TI = x log (ten³)
TI = 10 (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 ?

…….x 10⁻² W/1000²

a)one
b)2
c)iii
d)4

Pembahasan

Diketahui :
TI = 100 dB
Io =

10⁻¹²
W/m^2

Ditanya : Intensitas bunyi (I) dalam ruangan ?

Jawaban :

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

Intensitas bunyi dalam ruangan tersebut adalah 1 ten ten⁻² West/m²

 5. Dua gelombang bunyi mempunyai intensitas 1 ten

10⁻⁵
Westward/m2 dan


i x 10⁻⁴ Due west/m². Perbedaan taraf intensitasnya dalam dB adalah…
a. 10 dB
b. 20 dB
c. 30 dB
d. 40 dB
e. fifty dB

Pembahasan

Diketahui :
intensitas 1 (I₁) = 1 x ten⁻⁵ W/m²
intensitas 2 (I₂) = 1 x 10⁻⁴ Westward/m²
taraf intensitas pendengaran (I₀) = 10⁻¹² West/m²

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 (ten⁻⁵⁺¹²)
TI₁ = 10 log (ten⁷)
TI₁ = x (7)
TI₁ = 70 dB

TI₂ = x log (10⁻⁴/10⁻¹²)
     = 10 log (10⁻⁴⁺¹²)
     = 10 log (10⁸)
     = x (eight)
TI₂ = fourscore dB

Perbandingan intensitas kedua sumber bunyi :
I1 : I2
10^-xi : 10^-8

seven. Diketahui terdapat dua buah gelombang bunyi mempunyai yang memiliki intensitas masing- masing 1 x 10⁻⁷ W/m2 dan  ane x ten⁻⁴  W/m2. Perbedaan taraf intensitasnya dalam dB adalah…
a. 10 dB
b. 20 dB
c. 30 dB
d. forty dB
e. 50 dB

Pembahasan

Diketahui :
intensitas 1 (I₁) = 1 10 x⁻⁷ West/one thousand²
intensitas 2 (I₂) = 1 x 10⁻⁴ W/m²
taraf intensitas pendengaran (I₀) = 10⁻¹² Westward/m²

Ditanya : Perbedaan taraf intensitas (TI) dalam dB ?

Jawaban :
Taraf intensitas (TI) = x log I/I₀
TI₁ = 10 log (ten⁻⁷/10⁻¹²)
TI₁ = x log (10⁻⁷⁺¹²)
TI₁ = x log (x⁵)
TI₁ = 10 (⁵)
TI₁ = 50 dB

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

Perbedaan taraf intensitas = fourscore dB – 50 dB = 20 dB

8. Daya yang dihasilkan dari bunyi mesin Diesel pada jarak R sebesar 10π watt dan taraf intensitas bunyi yang didengar sebesar lxx dB. Jika intensitas ambang bunyi Io = 10⁻¹² W/1000² maka hitunglah jarak R.
a.250 chiliad
b.500 m
c.750 m
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.

9. Sebuah sumber gelombang bunyi dengan daya 50 Due west memancarkan gelombang ke medium di sekelilingnya yang homogen. Tentukan intensitas radiasi gelombang tersebut pada jarak 10 meter dari sumber …
A.0,04 Due west/m²
B.0,05 Due west/m²
C.0,06 West/m²
D.0,08 W/g²
E.0,01 W/m²

Pembahasan

Diketahui :

P = 50 Westward
r = 10 meter
Io = 10⁻¹² W/g²

Ditanya : intensitas radiasi gelombang (I) ?

Jawaban :

Intensitas bunyi pada jarak r
I = P / (4π r²)
I = 50 / (4π • x²)
I = ane/(8π) ≈ 0,04 Due west/m²

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

x. Jarak A ke sumber bunyi adalah iii 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 West/chiliad²

Ditanya : perbandingan intensitas ?

Jawaban :

Ra = 3 Rb
Ia/ Ib = Rb^2 / Ra^2
Ia/Ib = Rb^2 / (3Rb)^2
Ia/Ib = rb^two / 9Rb^ii
Ia/Ib = 1/9

b.40 dB

c.50 dB

d.60 dB

e.70 dB

Pembahasan

Diketahui :

R₁ = 3 m
R₂ = thirty m
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. 20 dB
B. fifty 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 :
Form :
Appointment :

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

ii.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-2 maka intensitas bunyi dengung yard lebah adalah….
a)x-8 Wm-2
b)10-6 Wm-2
c)x-v Wm-2
d)x-7 Wm-2
east)ten-4 Wm-2

3.Taraf intensitas suatu sumber bunyi pada jarak 9 m dari pengamat adalah fifty 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)60 dB

four.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

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

7.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 = x-12 W.m-2). Jika 100 klakson sepeda motor dan 10 klakson mobil serentak dibunyikan, maka perbandingan taraf intensitas sepeda motor dengan mobil adalah….
a)eight : ix
b)5 : 6
c)nine : ten
d)7 : viii
e)six : 7

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

9.Taraf intensitas suatu sumber bunyi pada jarak ix one thousand dari pengamat adalah 50 dB. Jika ditambah sembilan buah sumber bunyi identik yang dibunyikan bersamaan maka taraf intensitas total pada pengamat menjadi….
a)60 dB
b)5 dB
c)500 dB
d)forty dB
e)250 dB

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

11.Taraf intensitas satu ekor lebah yang berdengung adalah ten dB. Jika bunyi dengung masing-masing lebah tersebut dianggap identik dan intensitas ambang pendengaran manusia 10-12 Wm-2 maka intensitas bunyi dengung 1000 lebah adalah

a)x-eight Wm-2
b)10-iv Wm-2
c)10-5 Wm-2
d)x-7 Wm-2
east)10-6 Wm-2

12.Bunyi klakson sebuah sepeda motor saat dibunyikan menghasilkan taraf intensitas twoscore dB, sedangkan bunyi klakson sebuah mobil saat dibunyikan menghasilkan taraf intensitas lx dB. (Io = 10-12 W.m-2). Jika 100 klakson sepeda motor dan 10 klakson mobil serentak dibunyikan, maka perbandingan taraf intensitas sepeda motor dengan mobil adalah….
a)6 : 7
b)vii : 8
c)9 : ten
d)five : 6
due east)eight : 9

xiii.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)10^7 West/m2
b)10^6 W/m2
c)10^eight Westward/m2
d)ten-8 W/m2
e)10-12 W/m2

14.Intensitas bunyi mesin jahit yang sedang bekerja adalah 10-9 Wm-2. Untuk intensitas ambang bunyi x-12 Wm-two, maka taraf intensitas bunyi dari ten mesin jahit identik yang sedang bekerja adalah..
a)300 dB
b)400 dB
c)thirty dB
d)twenty dB
due east)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
east)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 10^4 W.m-2 , berarti intensitas gempa di A sebesar ….
a)eight,20 .10^4 W.one thousand-two
b)2,05 . 10^4 Westward.m-two
c)4,10 . 10^4 W.m-2
d)2,00 . 10^5 Due west.m-2
e)i,64 . 10^v Westward.yard-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^four W.g-2 , berarti intensitas gempa di A sebesar ….
a)4,10 . 10^four W.m-2
b)eight,20 .10^four W.m-2
c)1,64 . 10^5 W.m-ii
d)two,00 . ten^5 W.m-ii
eastward)2,05 . 10^4 W.m-2

19.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-ii ). Jika 100 klakson sepeda motor dan 10 klakson mobil serentak dibunyikan, maka perbandingan taraf intensitas sepeda motor dengan mobil adalah .
a)5 : half dozen
b)7 : viii
c)9 : 10
d)6 : 7
e)8 : 9

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

21.Taraf intensitas bunyi dalam suatu ruangan adalah 100 dB. Berapa intensitas bunyi dalam ruangan tersebut ? …..x 10-2 W/m2.
a)2
b)iv
c)3
d)1

22.Bunyi mempunyai intensitas 1 ten x-9 W/m2. Berapa taraf intensitasnya dalam satuan desibel (dB) ?
a)40
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 70 dB. Jika intensitas ambang bunyi Io = 10-12 Wm2 maka hitunglah jarak R.
a)1000 m
b)250 k
c)750 m
d)500 m

24.Hitunglah taraf intensitas sumber bunyi yang memiliki intensitas I = 10-5 watt/m2 jika intensitas ambang I0 = x-12 watt/m2.
a)70 dB
b)50 dB
c)80 dB
d)60 dB

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

26.Sebuah mesin mobil menghasilkan taraf intensitas bunyi TI = 70 dB (Io = 10-12 watt/m2). Agar suara mesin mobil menghasilkan taraf intensitas yang setara dengan suara sirine mobil ambulans, maka berapakah jumlah mesin mobil yang diperlukan.
a)40
b)30
c)twenty
d)ten

27.Suatu sumber bunyi mempunyai taraf intensitas l dB pada jarak 9 m dari pengamat. Bila ditambahkan ix buah sumber bunyi identik yang dibunyikan bersamaan, hitunglah taraf intensitas bunyi yang didengar pengamat.
a)40 dB
b)sixty dB
c)20 dB
d)80 dB

28.Pada jarak i,5 meter dari sumber ledakan terdengar bunyi dengan taraf intensitas 90 dB. Berapa taraf intensitas bunyi yang terdengar pada jarak 150 g dari sumber …
a)fifty dB
b)80 dB
c)seventy dB
d)100 dB
e)150 dB

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

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

31.Sumber bunyi dengan frekuensi 1400 Hz mengikuti pendengar yang menjauhinya. Jika kecepatan pendengar 100 1000/s, kecepatan sumber bunyi 60 g/s, dan cepat rambat bunyi saat itu 340 thousand/s, maka frekuensi bunyi yang diterima oleh pendengar adalah ….
a)600 Hz
b)900 Hz
c)800 Hz
d)1200 Hz
east)thousand Hz

32.Sebuah jendela dengan ukuran  2m x 3m dilewati bunyi dengan daya akustik  0,half-dozen W . Apabila intensitas ambang   x-16 W.cm-2  , taraf intensitas yang  terjadi pada jendela tersebut adalah…
a)300 dB
b)120 dB
c)150 dB
d)60 dB
e)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)xv dB
c)30 dB
d)20 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 i,2 m x ane 1000 adalah …
a)2,8x 10-4 Watt
b)one,2 x 10-4 Watt
c)2,2x 10-four Watt
d)three,2x ten-4 Watt
e)1,half dozen ten 10-iv 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 thou/s, 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 xxx dB banyaknya mesin yang sejenis sedang menyala adalah …
a)3 buah
b)20 buah
c)5 buah
d)30 buah
e)x 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 : ane
c)100 :1
d)grand : 1
due east)900 : 1

Answer Fundamental
one.d
2.a
3.east
four.a
5.a
six.d
seven.eastward
eight.d
ix.a
10.d
eleven.a
12.a
thirteen.d
14.e
xv.d
16.a
17.b
18.e
19.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 language VERSION

Assalammualaikum wr.wb.

Hullo friends how are you lot? hope y’all are in good health. amen ya rabbal alamin. On this occasion, masharist.com volition share nigh Examples of Physics Problems, namely the intensity and level of audio intensity and the Doppler Consequence

This material is material for class 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

Collection of Sample Issues and Discussion of Audio Intensity and Levels

i. Sound has an intensity of 1 x 10⁻⁵ W/m². What is the intensity level in decibels (dB)?

a)50

b)threescore

c)seventy

d)fourscore

Discussion

Is known :

I = i x 10⁻⁵ W/m2

Io = 1 10 x^-12 Westward/m2

Wanted : Level of Intensity (dB) ?

Answer:

TI = 10 logs (I/Io)

TI = 10 logs (10⁻⁵/ 10^-12)

TI = ten logs (10⁷)

Information technology = 10 (vii)

TI = 70 dB

The intensity level in decibels (dB) is 70 dB

It is known that a sound has an intensity of ten⁻⁴ W/m². What is the intensity level in decibels (dB)?

a)20

b)30

c)40

d)50

Word

Is known :

I = 1 ten 10⁻⁴ Westward/m²

Io = 1 ten 10⁻¹² W/thousand²

Wanted : Level of Intensity (dB) ?

Respond:

TI = ten logs (I/Io)

TI = x logs (x⁻⁴ / x⁻¹²)

TI = 10 logs (10⁸)

TI = x (8)

TI = 80 dB

The intensity level in decibels (dB) is 80 dB

3. Sound has an intensity of one x 10^-9 W/m². What is the intensity level in decibels (dB)?

a)20

b)30

c)xl

d)50

Discussion

Is known :

I = 1 10 10^-ix West/m2

Io = 10⁻¹² W/m²

Wanted : Level of Intensity (dB) ?

Answer:

TI = 10 logs (I/Io)

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

TI = 10 logs (10³)

IT = x (iii)

TI = xxx dB

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

iv. The level of sound intensity in a room is 100 dB. What is the intensity of the sound in the room? …….x 10⁻² Westward/one thousand²

a)1

b)2

c)three

d)iv

Discussion

Is known :

TI = 100 dB

Io = x⁻¹² W/grand^ii

Wanted: Sound intensity (I) in the room?

Reply:

Intensity level (TI) = 10 log I/I₀

(I/I₀) = TI/10

I / I₀ = 10^(TI / ten)

I = I₀ [x^(TI / 10)]

  = ten⁻¹² [10^(100 / 10)]

  = 10⁻² W/m²

The audio intensity in the room is i x 10⁻² W/m²

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

a. 10 dB

b. 20 dB

c. 30 dB

d. xl dB

e. 50 dB

Discussion

Is known :

intensity 1 (I₁) = 1 x 10⁻⁵ W/m²

intensity two (I₂) = 1 x 10⁻⁴ W/g²

hearing intensity level (I₀) = 10⁻¹² W/one thousand²

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

Answer:

Intensity level (TI) = 10 log I/I₀

TI₁ = 10 logs (x⁻⁵/x⁻¹²)

TI₁ = ten logs (10⁻⁵⁺¹²)

TI₁ = 10 logs (10⁷)

TI₁ = ten (7)

TI₁ = lxx dB

TI₂ = 10 logs (ten⁻⁴/10⁻¹²)

     = x logs (ten⁻⁴⁺¹²)

     = x logs (10⁸)

     = 10 (8)

TI₂ = 80 dB

The difference in intensity level = 80 dB – lxx dB = 10 dB

6. Make up one’s mind the ratio of the intensities of two sounds whose intensity levels are ten dB and twoscore dB.

Discussion

Is known :

TI1 = 10 dB

TI2 = 40 dB

Io = 10⁻¹² West/m²

Wanted: Comparing of the intensity of the 2 sounds (I1: I2)?

Answer:

Comparing of the intensity of the two sound sources:

I1: I2

ten^-eleven: 10^-8

7. It is known that two sound waves are having an intensity of i x 10⁻⁷ West/m2 and ane 10 ten⁻⁴ Westward/m2, respectively. The difference in intensity level in dB is…

a. 10 dB

b. twenty dB

c. 30 dB

d. 40 dB

e. 50 dB

Discussion

Is known :

intensity i (I₁) = i x ten⁻⁷ W/grand²

intensity two (I₂) = ane x 10⁻⁴ W/k²

hearing intensity level (I₀) = 10⁻¹² W/m²

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

Reply:

Intensity level (TI) = 10 log I/I₀

TI₁ = 10 logs (10⁻⁷/10⁻¹²)

TI₁ = 10 logs (10⁻⁷⁺¹²)

TI₁ = 10 logs (10⁵)

TI₁ = 10 (⁵)

TI₁ = l dB

TI₂ = ten logs (10⁻⁴/10⁻¹²)

     = 10 logs (10⁻⁴⁺¹²)

     = ten logs (10⁸)

     = 10 (8)

TI₂ = lxxx dB

The difference in intensity level = eighty dB – 50 dB = 20 dB

8. The power generated from the sound 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 sound Io = 10⁻¹² Westward/grand² so calculates the distance R.

a.250 m

b.500 thou

c.750 m

d.1000 g

Discussion

Is known :

P = 10π watts

TI = 70 dB

Io = 10⁻¹² W/m²

Wanted : distance R ?

Respond:

Then the distance R is 500 meters.

9. A audio moving ridge source with a power of 50 West radiates waves into a homogeneous surrounding medium. Determine the radiations intensity of the wave at a altitude of 10 meters from the source…

A.0.04 Due west/g²

B.0.05 W/m²

C.0.06 W/m²

D.0.08 W/m²

E.0.01 Due west/k²

Discussion

Is known :

P = 50 W

r = 10 meters

Io = 10⁻¹² Due west/m²

Wanted: intensity of radiation moving ridge (I)?

Respond:

Audio intensity at distance r

I = P / (4π r²)

I = 50 / (4π • 10²)

I = 1/(8π) 0.04 W/m²

Then the radiation intensity of the moving ridge (I) is 0.04 Westward/m²

10. The distance from A to the sound source is 3 times the altitude from B to the sound source. The intensity of the sound received by A is compared to the intensity of the sound received past B is

Discussion

Is known:

Ra = 3 Rb

Io = 10⁻¹² W/m²

Wanted: intensity comparison?

Reply:

Ra = 3 Rb

Ia/ Ib = Rb^ii / Ra^ii

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

Ia/Ib = rb^2 / 9Rb^ii

Ia/Ib = 1/9

So the comparison of the intensity received by a and b is a 1: nine

xi. If a sound is heard at a distance of 3 thou from the source of the explosion with an intensity level of fifty dB, then at a altitude of 30 m from the source of the explosion, a audio with an intensity level will be heard.

a.30 dB

b.40 dB

c.50 dB

d.sixty dB

eastward.70 dB

Discussion

Is known :

R₁ = three m

R₂ = 30 m

TI₁ = 50 dB

Asked

TI₂ = ?

Respond:

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

A. 20 dB

B. l dB

C. seventy dB

D. 75 dB

Eastward. 150 dB

Word

Is known :

TI₁ = 50 dB

n= 100

Asked:

TI₂ =?

Answer:

Sound intensity and level and Doppler Upshot

Proper name :

Grade :

DATES :

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

a)10^vi W/m2

b)ten^vii West/m2

c)10^8 Due west/m2

d)10-8 W/m2

e)10-12 W/m2

2. The intensity level of a buzzing bee is 10 dB. If the buzzing sound of each bee is considered identical and the intensity of the human hearing threshold is 10-12 Wm-2, and then the intensity of the buzzing sound of 1000 bees is…

a)10-viii Wm-2

b)10-6 Wm-2

c)10-five Wm-ii

d)10-7 Wm-2

east)ten-4 Wm-2

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

a)twoscore dB

b)five dB

c)250 dB

d)500 dB

e)60 dB

A wave that does non require a medium to propagate is called…

a) electromagnetic waves

b)longitudinal wave

c) traveling waves

d) stationary wave

e) mechanical waves

5. Which is the source of the sound?

a) all objects can exist a source of audio

b) hands when clapping

c) throat when we talk

d) plucked strings

due east) the table beingness hit or knocked

6.Points A and B are located at a distance of 4 m and ix thou from a sound source, respectively. If IA and IB are the sound intensities at signal A and point B, respectively, then IA: IB is

a)4: 9

b)iii: two

c)xvi: 81

d)81: 16

e)9: 4

7. 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 60 dB. (Io = ten-12 W.m-2). If 100 motorcycle horns and 10 automobile horns are sounded simultaneously, then the ratio of the intensity level of a motorbike to a car is…

a)8: 9

b)5: 6

c)9: 10

d)vii: eight

e)6: seven

8. The audio intensity of the sewing machine running is x-9 Wm-ii. For the sound intensity threshold of ten-12Wm-two, 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

east)400 dB

9. The intensity level of a sound source at a altitude of ix m from the observer is fifty dB. If ix identical sound sources are added together, the total intensity level for the observer becomes…

a)lx dB

b)5 dB

c) 500 dB

d)40 dB

east)250 dB

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

a)300 dB

b)400 dB

c)thirty dB

d)40 dB

eastward)20 dB

xi. 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 x-12 Wm-2, then the intensity of the buzzing audio of 1000 bees is

a)ten-eight Wm-2

b)10-4 Wm-ii

c)x-5 Wm-2

d)10-7 Wm-ii

e)x-6 Wm-2

12. The audio of a motorcycle horn when sounded produces an intensity level of xl dB, while the sound of a car horn when sounded produces an intensity level of 60 dB. (Io = 10-12 Westward.m-2). If 100 motorcycle horns and 10 auto horns are sounded simultaneously, and so the ratio of the intensity level of a motorcycle to a car is…

a)6: 7

b)7: 8

c)9: x

d)v: 6

east)8: 9

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

a)ten^7 Westward/m2

b)10^6 West/m2

c)10^8 W/m2

d)x-8 W/m2

e)10-12 W/m2

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

a)300 dB

b)400 dB

c)30 dB

d)20 dB

e)twoscore dB

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

a) the inverse of the sound intensity at that betoken

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

c) the logarithm of the ratio between the sound intensity and the threshold intensity of the sound

d) threshold intensity of sound

e) the intensity of the sound at that point

16. The greater the distance between the audio source and the listener, the higher the audio 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 8.2 ten 10^4 West.m-two, information technology means that the intensity of the convulsion at A is…

a)viii,20 .ten^4 W.m-two

b)two.05 . 10^4 West.thousand-two

c)4,10 . 10^4 Westward.m-2

d)2.00 . x^five West.m-2

e)1,64 . 10^5 W.thou-ii

18. The distance of observer A to the source of the convulsion is twice the altitude of observer B to the source of the earthquake. If the intensity of the earthquake at observer B is eight.2 x x^iv Due west.m-2, it ways that the intensity of the earthquake at A is…

a)4,10 . 10^iv Due west.yard-2

b)8,20 .10^4 W.grand-two

c)1,64 . x^5 W.m-two

d)2.00 . 10^5 W.thou-2

due east)2.05 . 10^iv Due west.m-two

19. 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 60 dB (Io = 10-12 Due west m-2 ). If 100 motorcycle horns and 10 auto horns are sounded simultaneously, so the ratio of the intensity level of a motorbike to a car is.

a)5: 6

b)7: 8

c)9: 10

d)6: 7

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? …..x 10-ii W/m2.

a)two

b)four

c)3

d)1

22. Audio has an intensity of 1 ten 10-9 W/m2. What is the intensity level in decibels (dB)?

a)40

b)twenty

c)30

d)50

23. The ability generated from the sound of the Diesel 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 so calculates the distance R.

a)chiliad m

b)250 thousand

c)750 thousand

d)500 m

24. Calculate the intensity level of a sound source that has an intensity of I = 10-5 watts/m2 if the threshold intensity I0 = 10-12 watts/m2.

a)70 dB

b)50 dB

c)80 dB

d)sixty dB

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

a)500 one thousand

b)250 m

c)grand m

d)750 m

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

a)40

b)30

c)20

d)x

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

a)twoscore 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 audio with an intensity level of xc dB was heard. What is the intensity level of the sound heard at a altitude of 150 one thousand from the source?

a)50 dB

b)lxxx dB

c)70 dB

d)100 dB

east)150 dB

29. The source of the audio and the listener are moving toward each other at the aforementioned speed of twenty k/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 fourth dimension is 340 m/s, then the actual source frequency is…

a)540 Hz

b)640 Hz

c)320 Hz

d)270 Hz

due east)200 Hz

30. A sound source with a frequency of 680 Hz is moving at a speed of xx grand/s away from a stationary ear, well-nigh the listener is another sound source emitting a sound of frequency 644 Hz. If the speed of sound in air is 320 m/s, and then the frequency of the sound received by the listener is…

a)4 Hz

b)five Hz

c)2 Hz

d)6 Hz

due east)3 Hz

31. A audio source with a frequency of 1400 Hz follows the listener abroad from it. If the speed of the listener is 100 one thousand/south, the speed of the source of audio is 60 grand/south, and the speed of audio is 340 thousand/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)1000 Hz

32. A window measuring 2 m x 3 m passes sound with an acoustic power of 0.6 W. If the threshold intensity is 10-16 W.cm-two, 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 x objects with the aforementioned intensity level, then sound simultaneous, then the resulting total intensity level is…

a)27 dB

b)15 dB

c)30 dB

d)xx dB

e)25 dB

34. The intensity level of a window caused by noise on the highway is eighty dB. The ability of audio entering a window with a window size of 1.ii m x i m is…

a)2.8x 10-4 Watt

b)one.ii x 10-4 Watt

c)2.2x 10-four Watt

d)3.2x ten-four Watt

e)1.6 x x-4 Watt

35. A bat flies towards a ripe mango on a tree. To confirm the position of the fruit, the bat emits ultrasonic waves with a frequency of 24 kHz. If the flight speed of the bat is twenty m/due south and the speed of sound is 340 m/s, so 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 20 dB, and so when the intensity level becomes 30 dB, the number of similar machines running is…

a) 3 pieces

b)twenty pieces

c) 5 pieces

d)30 pieces

eastward)10fruit

37. The intensity level of a motorcar is fifty dB and the intensity level of lightning is 80 dB, then the ratio of the intensity of the sound of lightning to the machine is

a)500: ane

b)200: 1

c)100:i

d)1000: ane

e)900: 1

Answer Key

i.d

two.a

3.due east

iv.a

5.a

6.d

seven.due east

eight.d

ix.a

10.d

11.a

12.a

xiii.d

fourteen.e

15.d

16.a

17.b

18.due east

19.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.east

33.a

34.b

35.d

36.eastward

37.d

Inspired past

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

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

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