Audio in conditions is a vibration, so that our ears percieve by the feeling of hearing. Vibrations traveling to our ears via the air. In which the instincts become noise the ear converts those sound waves to nerve impulses that are sent to our minds. To say all that in a more technical language: Audio”is an alternation in pressure, particle displacement, or particle velocity propagated in an elastic material” (Olson 1957). Audio can be a collection of mechanical compressions and rarefactions or longitudinal waves that successively propagate through media that are compressible. What causes sound waves is popularly called”the origin of waves”. Examples of noises resources is.
The four main characteristics of sound are frequency, wavelength, amplitude and speed.
Even the frequency of audio is the range of air pressure oscillations per second at a fixed point occupied by a sound wave.
Even the amplitude is the magnitude of sound pressure change within the tide. This is the maximum amount of strain at any point in the wave. A sound wave is caused literally by increases in pressure at certain points resulting in a”domino effect” outward, the higher pressure points are the crests in a solid wave, and behind them are low pressure points which tail them. These are called the troughs in a graph. Sound’s propagation Velocity is dependent mostly on the kind, temperature and pressure of the medium by which it spreads. The speed of sound doesn’t rely on air pressure, Since air is almost a perfect gas.
The frequency array is approx. between 20 and 20,000 Hz. This array of course varies between people, and extends as are age increases. Sounds will start to damage our ears at 85 dBSPL and sounds above approximately 130 dBSPL will lead to pain, because a result are called the:”threshold of pain”. Of course again this range will vary among people and will alter with age.