Home
Class 11
PHYSICS
When a person wears a hearing aid, the s...

When a person wears a hearing aid, the sound intensity level increases by 30 dB. The sound intensity increases by

A

`e^2`

B

`10^3`

C

`30`

D

`10^2`

Text Solution

Verified by Experts

The correct Answer is:
B
`L_2-L_1=30dB`
`10dBlog((I_2)/(I_0))-10dBlog((I_1)/(I_0))=30dB`
`log_(10)((I_2)/(I_1))=3implies(I_2)/(I_1)=10^3`
Hence the sound intensity increases by `10^3`.
Promotional Banner

Topper's Solved these Questions

  • SOUND WAVES AND DOPPLER EFFECT

    CENGAGE PHYSICS|Exercise Multiple Correct|44 Videos

  • SOUND WAVES AND DOPPLER EFFECT

    CENGAGE PHYSICS|Exercise Assertion-Reasoning|24 Videos

  • SOUND WAVES AND DOPPLER EFFECT

    CENGAGE PHYSICS|Exercise Subjective|56 Videos

  • RIGID BODY DYNAMICS 2

    CENGAGE PHYSICS|Exercise Interger|2 Videos

  • SUPERPOSITION AND STANDING WAVES

    CENGAGE PHYSICS|Exercise Comprehension Type|5 Videos

Similar Questions

Explore conceptually related problems

Most people interpret a 9.0 dB increase in sound intensity level as a doubling in loudness. By what factor must the sound intensity be increase to double the loudness?

A sound absorber attenuates the sound level by 20 dB . The intensity decreases by a factor of

At a distance of 5.0 m from a point sound source, the sound intensity level is 110 dB. At what distance is the intensity level 95 dB?

(a) By what factor must the sound intensity be increased the sound intensity level by 13.0 dB ? (b) Explain why you do not need to know the original sound intersity ?

If the intensity of sound increased by a factor of 20 then the sound level increases in decibels by the

The intensity of sound increases at night due to

CENGAGE PHYSICS-SOUND WAVES AND DOPPLER EFFECT-Single Correct
  1. The frequency of a car horm is 400 Hz. If the horn is honked as the ca...

    Text Solution

    |

  2. Spherical sound waves are emitted uniformly in all direction from a po...

    Text Solution

    |

  3. When a person wears a hearing aid, the sound intensity level increases...

    Text Solution

    |

  4. A motorcycle starts from rest and accelerates along a straight line at...

    Text Solution

    |

  5. The difference in the speeds of sound in air at -5^@C, 60 cm pressure ...

    Text Solution

    |

  6. A train is moving in an elliptical orbit in anticlockwise sense with a...

    Text Solution

    |

  7. A stationary observer receives a sound from a sound of freqeuency v0 m...

    Text Solution

    |

  8. The sound from a very high burst of fireworks takes 5 s to arrive at t...

    Text Solution

    |

  9. A car emitting sound of frequency 500 Hz speeds towards a fixed wall a...

    Text Solution

    |

  10. In the figure shown, a source of sound of frequency 510 Hz moves with ...

    Text Solution

    |

  11. A wall is moving with velocity u and a source of sound moves with velo...

    Text Solution

    |

  12. For a sound wave travelling towards +x direction, sinusoidal longitudi...

    Text Solution

    |

  13. If the source is moving towards right, wavefront of sound waves get mo...

    Text Solution

    |

  14. Consider a souce of sound S, and an observer/detector D. The source em...

    Text Solution

    |

  15. When source and detector are stationary but the wind is blowing at spe...

    Text Solution

    |

  16. Figure. Represents the displacement y versus distance x along the dire...

    Text Solution

    |

  17. The driver of a car approaching a vertical wall notices that the frequ...

    Text Solution

    |

  18. The difference between the apparent frequency of a sound of sound as p...

    Text Solution

    |

  19. The frequency of a radar is 780 MHz. After getting reflected from an a...

    Text Solution

    |

  20. A train moves towards a stationary observer with speed 34 m//s. The tr...

    Text Solution

    |