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Temperature dependency of physical quantities speed of ...
http://www.sengpielaudio.com/TemperatureSound.htm
Z 0 = ρ 0 × c Z 0 is the specific acoustic impedance of air and c is the speed of sound. In SI units with dry air at 20°C (68°F), the speed of sound c is 343 m/s. This also equates to 1235 km/h, 767 mph, 1125 feet per second (ft/s), or 666 …
pIZ I 400 - Eberhard Sengpiel
http://www.sengpielaudio.com/SoundPressureToSoundIntensityFormula.pdf
Specific acoustic impedance of air Z0 = 400 N·s/m3 (Specific acoustic impedance of air: Z0 = 413 N·s/m³ or Pa·s/m at 20°C) Sound pressure p 1 Pa ≡ 0.0025 W/m² (equivalent to sound level 94 dB) pIZ I 400. Sound intensity I 1 W/m² ≡ 20 Pa (equivalent to sound level 120 dB) 22 400 pp I Z
Speed of sound - temperature matters, not air …
http://www.sengpielaudio.com/SpeedOfSoundPressure.pdf
of the air pressure . p. Reason: The . air pressure and the air density . are proportional to each other at the same temperature. This means in Eq. 1: The ratio . p. 0 / 0. is always constant. The speed of sound in air depends on the density of air and …
Sound pressure level SPL 400 particle ... - Eberhard Sengpiel
http://www.sengpielaudio.com/calculator-ak-ohm.htm
As characteristic impedance of air we use the round value Z = 400 N·s/m³ (Pa·s/m). Then the "sound level", that is the sound pressure level and the sound intensity level is exactly the same as a decibel value. Specific acoustic impedance of air at 20°C is Z0 = 413 N · s/m³ (Pa·s/m). Density of air ρ and speed of sound c = λ × f
Relationship of acoustic quantities ... - sengpielaudio
http://www.sengpielaudio.com/ConnectionOfAcousticSizes.pdf
Specific acoustic impedance . Z = c = p v = 2. I v = p. 2. I. in . 3. Ns m Density of air in . 3. kg m is 1.204 kg/m³ at 20°C . Angular frequency = 2 ... Eberhard Sengpiel - sengpielaudio Created Date: 1/7/2014 2:43:58 PM ...
Impedance matching impedance bridging interface ...
http://www.sengpielaudio.com/calculator-bridging.htm
impedance matching and impedance bridging an interface connecting Z in and Z out circuit dampening damping factor - no matching in audio - DF resistor pad audio engineering sound recording - Eberhard Sengpiel - sengpielaudio
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