Sound Design Waves And Sound 4

Question 1

What distinguishes a harmonic from an inharmonic partial?

Accepted Answer

Harmonics are integer multiples of the fundamental; inharmonics are not

Answer

Harmonics are whole-number multiples of the fundamental frequency, while inharmonic partials fall at non-integer ratios, creating bell-like or percussive timbres.

Question 2

When two tones at 440 Hz and 443 Hz are played simultaneously, what audible effect occurs?

Accepted Answer

Beat frequency of 3 Hz

Answer

Beat frequencies occur at the difference between two close frequencies — 443 − 440 = 3 Hz, heard as a pulsing amplitude variation three times per second.

Question 3

A material with high acoustic absorption will have which property?

Accepted Answer

High absorption coefficient close to 1.0

Answer

An absorption coefficient near 1.0 means nearly all incident sound energy is absorbed rather than reflected, which is ideal for acoustic treatment.

Question 4

In the context of waves, what does 'superposition' mean?

Accepted Answer

The resultant displacement is the sum of individual wave displacements

Answer

The principle of superposition states that when waves overlap, the net displacement at any point is the algebraic sum of the individual wave displacements.

Question 5

Which factor primarily determines the characteristic timbre of different musical instruments playing the same pitch?

Accepted Answer

Harmonic content (overtone spectrum)

Answer

Timbre is shaped by the unique harmonic content — the blend of overtones above the fundamental — which differs between instruments.

Sound Design Practice Test

Sound Design Practice Test

Sound Design Waves And Sound 4