Sound Characteristics
Sound in short however remarkable terms may be a vibration that our ears understand by the sense of hearing. Most commonly vibrations travel to our ears via the air. The ear then converts these sound waves into nerve impulses that are sent to our brains, where the impulses become sound. To say all that during a lot of technical language: Sound “is an alternation in pressure, particle displacement, or particle velocity propagated in an elastic material” (Olson 1957).
Sound is also a series of mechanical compressions and rarefactions or longitudinal waves that successively propagate through media that are at least a very little compressible. What causes sound waves is known as “the supply of waves”. Examples of sounds sources are: A violin string that vibrates upon being bowed or plucked.
The four characteristics of sound are frequency, wavelength, amplitude and velocity.
The frequency of sound is the quantity of air pressure oscillations per second at a fastened purpose occupied by a sound wave.
The amplitude is that the magnitude of sound pressure modification among the wave. Basically this is the utmost amount of pressure at any purpose in the sound wave. A sound wave is caused literally by will increase in pressure at certain points inflicting a “domino effect” outward, the upper pressure points are the crests in a sound wave, and behind them are low pressure points that tail them. These are known as the troughs on a wavelength graph. Sound’s propagation Velocity depends largely on the kind, temperature and pressure of the medium through which it propagates. Because air is nearly an excellent gas, the speed of sound does not rely on air pressure.
The frequency range of sound that is audible to humans is approx. between 20 and 20,000 Hz. This vary of course varies between people, and goes down as are age increases. Sounds can begin to wreck our ears at 85 dBSPL and sounds on top of approximately one hundred thirty dBSPL can cause pain, hence are known as the: “threshold of pain”. After all once more this range can vary among individuals and can amendment with age.