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<blockquote data-quote="SicAudio" data-source="post: 6616014" data-attributes="member: 609136"><p>never said the speed of the sound changes dude i said the wavelength learn to read //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif</p><p></p><p>Sound energy is transmitted through air (or other particles) as a traveling pressure wave. In air the displacement wave amplitude may range from 10-7 mm to a few mm per second.</p><p></p><p>Frequency</p><p></p><p>The frequency - cycles per second - of a sound is expressed in hertz - Hz. The frequency can be expressed as</p><p></p><p>f = 1 / T (1)</p><p></p><p>where</p><p></p><p>f = frequency (s-1, Hz)</p><p></p><p>T = time for completing one cycle (s)</p><p></p><p>Example - Frequency</p><p></p><p>The time for completing one cycle for a 500 Hz tone can be calculated using (1) as</p><p></p><p>T = 1 / (500 Hz)</p><p></p><p>= 0.002 s</p><p></p><p>The range for human hearing is 20 to 20.000 Hz. By age 12-13.000 Hz are the upper limit for many people.</p><p></p><p>Wavelength</p><p></p><p>The wavelength of sound is the distance between analogous points of two successive waves.</p><p></p><p>λ = c / f (2)</p><p></p><p>where</p><p></p><p>λ = wavelength (m)</p><p></p><p>c = speed of sound (m/s)</p><p></p><p>f = frequency (s-1, Hz)</p><p></p><p>Example - the Wavelength of a Tone</p><p></p><p>In air at normal atmosphere at 0 oC the speed of sound is 331.2 m/s. The wavelength of a 500 Hz tone can be calculated as:</p><p></p><p>λ = (331.2 m/s) / (500 Hz)</p><p></p><p>= 0.662 m</p></blockquote><p></p>
[QUOTE="SicAudio, post: 6616014, member: 609136"] never said the speed of the sound changes dude i said the wavelength learn to read [IMG]//content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif[/IMG] Sound energy is transmitted through air (or other particles) as a traveling pressure wave. In air the displacement wave amplitude may range from 10-7 mm to a few mm per second. Frequency The frequency - cycles per second - of a sound is expressed in hertz - Hz. The frequency can be expressed as f = 1 / T (1) where f = frequency (s-1, Hz) T = time for completing one cycle (s) Example - Frequency The time for completing one cycle for a 500 Hz tone can be calculated using (1) as T = 1 / (500 Hz) = 0.002 s The range for human hearing is 20 to 20.000 Hz. By age 12-13.000 Hz are the upper limit for many people. Wavelength The wavelength of sound is the distance between analogous points of two successive waves. λ = c / f (2) where λ = wavelength (m) c = speed of sound (m/s) f = frequency (s-1, Hz) Example - the Wavelength of a Tone In air at normal atmosphere at 0 oC the speed of sound is 331.2 m/s. The wavelength of a 500 Hz tone can be calculated as: λ = (331.2 m/s) / (500 Hz) = 0.662 m [/QUOTE]
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