What determines the volume of a sound?

Answer 1

Loudness is the subjective personal perception of the ears and brain of a listener. Perceived loudness varies from person to person and cannot be measured.

You can measure the objective sound pressure or sound pressure level SPL but not the subjective loudness.

Answer 2

Usually, people are asking as if there is just "the" amplitude in sound waves in air.

The loudness perception of a sound is determined by the amplitude of the sound waves −

the higher the amplitude, the louder the sound.

Which amplitude of sound (sound amplitude) do you mean?

There are:

amplitude of particle displacement ξ, or displacement amplitude

amplitude of sound pressure p or pressure amplitude

amplitude of sound particle velocity v, or particle velocity amplitude

amplitude of pressure gradient Δ p, or pressure gradient amplitude.

Furthermore, think of the amplitude of the oscillation of a string.

The maximum magnitude of the deflection of a wave is called amplitude.

Look at link: "What is an amplitude?"

Answer 3

The source of the sound determines how loud it is. Sound is a pressure wave transmitted through a material medium the energy being released at the point of origin of the sound determines the energy in that pressure wave and the more the energy the louder the sound.

Answer 4

Ampitude, determines the intensity of sound.

Answer 5

The volume of a sound is measured by the sound pressure in pascals or newtons per square meter. The sound pressure level is measured by a sound pressure level meter (SPL meter).

Answer 6

The amplitude of the sound pressure is changed.

Answer 7

If you meant the volume of a sound then it is a decibel meter, which measures in units called decibels and is abbreviated to DB.

Answer 8

Difference in air pressure between the minimum and maximum pressures of the wave.

Answer 9

Vibration s per second

Answer 10

Its amplitude.