Each key on a touch-tone telephone makes a slightly different sound when touched.This difference is due to the pitch of sound produced by each key.The difference in pitch is determined by the _____ of the sound waves coming from each key.
A)intensity
B)timbre
C)decibel
D)frequency

Question

Quizplus · Accepted Answer

The pitch of a sound is determined by its frequency, which is the number of sound waves produced per second. Therefore, the best choice is frequency, which is represented by letter D. Intensity (A) refers to the loudness of a sound, while timbre (B) refers to the quality or tone color of a sound. Decibel (C) is a unit used to measure the intensity or loudness of a sound.

Each Key on a Touch-Tone Telephone Makes a Slightly Different