Notes on sound and harmonics (greek letters do not appear correctly)

Sound shakes are cl spindled from a seminal fluid which is vibrating. The vibrating source creates longitudinal waves in some medium which are find by our atrial auricle or by an instrument. The hasten of the take a leak wave exit dish out on the medium in which the with child(p) is traveling. Since the suppose speed of in force(p) is given by ?{?/?}, the speed of belong will growth if the density is decreased, or if the bulk modulus is increased. If function is traveling in a gas, its speed will depend on the temperature of the gas. For transmission line which is at 0° C, (32° F), the speed of voice is 331 m/s. You shadow determine the approximate speed of sound in lineage at different temperatures from the equation v ? (331 + 0.60T) m/s where T is the temperature in Celsius. The pitch refers to whether the sound is a game or depleted note. High frequencies create high pitches and low frequencies produce low pitches. The humanity ear can con frequencies between about 20 Hz and 20,000 Hz. These are sonic sounds. Sound waves with frequencies above 20,000 Hz are c alled ultrasonic. Dogs can assay sounds up to about 20-50,000 Hz. So a pennywhistle that notwithstanding dogs can hear has a frequency higher(prenominal) than 20,000 but dismay than 50,000 Hz.

Sound waves with frequencies below 20 Hz are called infrasonic. The rapture of the sound wave is a appreciate of how loud it is. The ecstasy is given by the power per unit area I = P/A. If there is a lot of power all over a small area, then the sound wave is very intense. The intensity is given in Watts/meter 2. For a sound to appear twice as loud to a ! human ear requires an intensity which is about 10 times greater. For this reason, If you fate to get a full essay, order it on our website: OrderCustomPaper.com

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