characteristics of its

characteristics of its Its short, but in terms remarkeable is a vibration, that our ears perceive the sense of hearing. Most joueys vibrations in our ears through the air. The ear then converts these sound waves into nerve impulses that are sent to our brain where the impulses become sound. To say that, in more technical language: Sound "is an alteation in pressure, particle displacement or particle velocity propagated in an elastic material" (Olson 1957). The sound is also a series of mechanical compressions and rarefaction waves longitudinal and subsequently propagate through media that are at least somewhat 'compressible. What causes sound waves is known as "the source of the waves." Examples of sources of sounds: a violin string vibrates when plucked or arc. The four characteristics of sound are frequency, wavelength, amplitude and speed. The frequency of sound is the number of oscillations of air pressure per second at a fixed point occupied by a sound wave. The scale is the scale of variations in sound pressure waves. Basically, this is the maximum pressure at any point in the sound of the waves. A 'sound wave is literally caused by increased pressure at certain points to cause a "domino effect" outward, plus the pressure points are the peaks of a sound wave, and behind them the pressure points that are small tail. These are the cables on a wavelength graph. Speed of sound depends largely on the type, temperature and pressure of the medium in which it spreads. Because the air is nearly a perfect gas, the speed of sound does not depend on the atmospheric pressure. The frequency range of sound that is audible to humans is approx. between 20 and 20,000 Hz range of courses varies between individuals, and goes down as the age increases. Sounds will begin to damage our ears at 85 dBSPL and sounds on top of about 130 dBSPL cause pain, so they are known as "pain threshold". Of course in this area vary between individuals and changes with age.