Question Detail

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

What is the approximate value of the reference intensity (Io) used in standard decibel calculations for sound?
Options
A 10<sup>-11</sup> W/m<sup>2</sup>
B 10<sup>-12</sup> W/m<sup>2</sup>
Correct Answer
C 10<sup>-10</sup> W/m<sup>2</sup>
D 10<sup>-9</sup> W/m<sup>2</sup>
Correct Answer

Option B is the correct answer.

Detailed Explanation

The document specifies, 'Io is about 10-12 W / m2.' This value represents the threshold of human hearing and serves as the reference point for the decibel scale.

Hint

This value represents the softest sound a human ear can typically detect.

Question Info

Course: PHY 104
Topic: Pitch, loudness, quality, timber
Type: Objective
Difficulty: Not specified
Question 403 of 947
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