Sound Design Psychoacoustics and Sound Perception

Question 1

What does psychoacoustics primarily study?

Accepted Answer

The human perception and psychological responses to sound

Answer

The physics of sound wave propagation in air

Answer

The electronic circuits used in audio equipment

Answer

The mathematical modeling of acoustic spaces

Question 2

The Fletcher-Munson equal loudness contours demonstrate that:

Accepted Answer

Human hearing is less sensitive to very low and very high frequencies at low volumes

Answer

All frequencies are perceived equally loud at any sound pressure level

Answer

Low frequencies are always perceived louder than high frequencies regardless of level

Answer

Loudness perception is entirely independent of frequency

Question 3

What is the threshold of hearing (0 dB SPL) defined as?

Accepted Answer

The quietest sound that can be detected by a young, healthy human ear

Answer

The level at which sound causes physical pain

Answer

The average level of conversational speech

Answer

The noise floor of professional recording equipment

Question 4

The Haas effect (Precedence Effect) states that two identical sounds arriving within 1–40ms are perceived as:

Accepted Answer

A single sound localized to the direction of the first arrival

Answer

Two distinct echoes separated in space

Answer

A louder combined sound from a center position

Answer

A phased or comb-filtered version of the original signal

Question 5

Auditory masking occurs when:

Accepted Answer

One sound makes it more difficult or impossible to hear another sound

Answer

A sound is recorded using noise-canceling microphone technology

Answer

Reverb is applied to reduce the perceived loudness of a signal

Answer

Headphones physically block external ambient noise from reaching the ear

Question 6

Which physical property of a sound wave primarily determines its perceived pitch?

Accepted Answer

Frequency

Answer

Amplitude

Answer

Timbre

Answer

Phase

Question 7

What does 'timbre' (tone color) describe in sound perception?

Accepted Answer

The quality that distinguishes sounds of the same pitch and loudness from different sources

Answer

The loudness of a sound measured in decibels

Answer

The pitch of a sound determined by its frequency

Answer

The duration or sustain of a musical note