The loudness of a sound is determined by the __________ of the sound waves and expressed in __________ units of measurement.

Question

Quizplus · Accepted Answer

The loudness of a sound is determined by the amplitude of the sound waves, which is the measure of the maximum displacement of the waves from their mean rest position. The loudness is expressed in decibel units of measurement, which is a logarithmic scale that compares the intensity of the sound to a reference level of 0 decibels, which represents the threshold of audibility for most people. Therefore, option D is the correct answer. Option A is incorrect because the wavelength of the sound waves determines the pitch or frequency of the sound, not its loudness. Option B is incorrect because millimicrons are a measure of length, not loudness. Option C is incorrect because pounds pressure is a measure of force, not loudness.

The Loudness of a Sound Is Determined by the __________