Question Detail

PHY 104 Pitch, loudness, quality, timber Objective Question
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Question

If the intensity of a sound (I) is equal to the reference intensity (I0), what is the loudness level (L) in decibels (dB)?
Options
A -10 dB
B 0 dB
Correct Answer
C 1 dB
D 10 dB
Correct Answer

Option B is the correct answer.

Detailed Explanation

The formula for loudness is L = 10log10(I/I0). If I = I0, then L = 10log10(I0/I0) = 10log10(1) = 0 dB. The text confirms: 'The loudness at this intensity is zero decibel.'

Hint

What is log10(1) equal to?

Question Info

Course: PHY 104
Topic: Pitch, loudness, quality, timber
Type: Objective
Difficulty: Not specified
Question 361 of 947
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