Loudness of pure tones depends on frequency and sound pressure level can be shown graphically using
A) equal loudness curves.
B) timbre resonance curves.
C) receiver operating characteristic curves.
D) Fourier functions.

Question

Quizplus · Accepted Answer

Equal loudness curves graphically show the relationship between sound pressure level and frequency for a tone to be perceived as equally loud to a standard reference tone at a fixed sound pressure level. It is widely used to adjust sound levels in different frequency ranges for noise control or design of sound systems. Timbre resonance curves represent the relative energy distribution of harmonics in a sound signal and are not directly related to loudness perception. Receiver operating characteristic curves are typically used in signal detection and decision-making tasks and are not relevant to the perception of pure tones. Fourier functions represent a mathematical tool for analyzing complex signals into component frequencies and are not necessarily tied to the perceptual attributes of loudness.

Loudness of Pure Tones Depends on Frequency and Sound Pressure