For a person with normal hearing, the faintest sound that can be heard at a frequency of 400 Hz has a pressure amplitude of about 6.0 × 10-5 Pa. Use bulk modulus for air 1.42 × 105 Pa and v = 344 m/s at 20°C. Calculate the sound intensity level in decibels.

For a person with normal hearing, the faintest sound that can be heard at a frequency of 400 Hz has a pressure amplitude of about 6.0 × 10-5 Pa. Use bulk modulus for air 1.42 × 105 Pa and v = 344 m/s at 20°C. Calculate the sound intensity level in decibels.

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter14: Sound

Section: Chapter Questions

Problem 15P: A person wears a hearing aid that uniformly increases the intensity level of all audible frequencies...

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Question

For a person with normal hearing, the faintest sound that can be heard at a frequency of 400 Hz has a pressure amplitude of about 6.0 × 10^-5Pa.

Use bulk modulus for air 1.42 × 10⁵Pa and v = 344 m/s at 20°C.

Calculate the sound intensity level in decibels.

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