An increase of 10 decibels corresponds to what approximate change in perceived loudness?

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Prepare for the NYSID Materials and Methods Exam 1. Study with flashcards and multiple choice questions, each question has hints and explanations. Get ready for your exam!

Multiple Choice

An increase of 10 decibels corresponds to what approximate change in perceived loudness?

Explanation:
Decibels measure sound intensity on a logarithmic scale. A difference of 10 dB corresponds to about a tenfold increase in actual sound power, since L = 10 log10(I/I0). But our ears perceive loudness in a way that compresses this scale, so that a 10 dB increase feels roughly twice as loud. That’s why an increase of 10 dB is about a 2x change in perceived loudness. (For context, 20 dB is about 4x, 30 dB about 8x, though these are approximate.)

Decibels measure sound intensity on a logarithmic scale. A difference of 10 dB corresponds to about a tenfold increase in actual sound power, since L = 10 log10(I/I0). But our ears perceive loudness in a way that compresses this scale, so that a 10 dB increase feels roughly twice as loud. That’s why an increase of 10 dB is about a 2x change in perceived loudness. (For context, 20 dB is about 4x, 30 dB about 8x, though these are approximate.)

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