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volume
The sound pressure amplitude tells about how loud the tone will be and the frequency (cycles per second) of the oscillation tells how high the sound of the tone will be. The amplitude gives the loudness of the tone: http://en.wikipedia.org/wiki/Loudness The frequency gives the pitch of the tone: http://en.wikipedia.org/wiki/Pitch_%28music%29
A change in the amplitude.
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?"
Amplitude is intensity. It refers to the strength of a sound wave, which the human ear interprets as volume or loudness and if you decrease the amplitude you also decrease its intensity.
The amplitude of the sound pressure.
Amplitude decides the intensity (loudness) of the sound. Intensity is directly proportional to the square of the amplitude of vibration.
volume
The sound pressure amplitude tells about how loud the tone will be and the frequency (cycles per second) of the oscillation tells how high the sound of the tone will be. The amplitude gives the loudness of the tone: http://en.wikipedia.org/wiki/Loudness The frequency gives the pitch of the tone: http://en.wikipedia.org/wiki/Pitch_%28music%29
A change in the amplitude.
It gets louder or quieter.
The loudness of a sound is the same thing as the overall amplitude of a sound. When measuring sound, in general, you have pitch (frequency) and tone (amplitude, the measure of loudness). So, if you increase the amplitude of a sound wave pattern, you increase the overall intensity of the sound (the energy), and that can be measured on the logarithmic scale of decibels, since an unconstrained, undirected sound wave carries its energy outward in all directions, in an increasing volume of air (or other medium).
it is how loud the sound is ^Smartass comment. The real answer: Loudness is determined by the intensity of sound waves.
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?"
Amplitude is intensity. It refers to the strength of a sound wave, which the human ear interprets as volume or loudness and if you decrease the amplitude you also decrease its intensity.
amplitude is the height of the sound wave.
Amplitude has to do with sound. Vibrating air creates sound using amplitude which is the size of the vibration, and how loud it is. Frequency is the speed of the vibration. The higher the speed, the higher the sound and vice-versa. Amplitude has no effect on wave speed as relates to sound. I believe the same holds for waves of water. Amplitude or size of the wave effects its impact, not its speed.