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Table chart sound pressure levels SPL ... - Eberhard …
http://www.sengpielaudio.com/TableOfSoundPressureLevels.htm
The threshold of hearing corresponds to the sound pressure level Lp = 0 dB at f = 1 kHz. Sound intensity I as Sound energy quantity: The auditory threshold is calculated as the reference sound intensity I0 = 10 −12 W/m 2. The threshold of hearing corresponds also to the sound intensity level LW = 0 dB at f = 1 kHz.
The relation of sound quantities references and levels ...
http://www.sengpielaudio.com/calculator-soundvalues.htm
The auditory threshold is calculated as the reference sound intensity I 0 = 10 −12 W/m 2. The threshold of hearing corresponds also to the sound intensity level L W = 0 dB at f = 1 kHz. The loudness of the sound , however, is a psychoacoustic measure of how loud a sound from certain people as acoustic event is sensed.
SPL sound level to dB pressure level sound pressure …
http://www.sengpielaudio.com/calculator-soundlevel.htm
The auditory threshold is used as the reference sound pressure p0 = 20 µPa = 2 × 10 −5 Pa. The threshold of hearing corresponds to the sound pressure level Lp = 0 dB at f = 1 kHz. Sound intensity I as Sound energy quantity: The auditory threshold is calculated as the reference sound intensity I0 = 10 −12 W/m 2.
Total dB level adding of incoherent or ... - Eberhard Sengpiel
http://www.sengpielaudio.com/calculator-leveladding.htm
Auditory threshold at 1 kHz = 0.00002 Pa = 20 µPa. Level adding of up to four sound sources Adding Amplitudes and Levels - incoherent and coherent Adding decibels - combining up to ten acoustic levels Combining decibels of one-third octave bands to …
Permissible Exposure Time for Noise SPL sound …
http://www.sengpielaudio.com/PermissibleExposureTime.htm
Sound Pressure Level Sound pressure Permissible Exposure Time 115 dB 11.2 Pa 0.46875 minutes (~30 sec) 112 dB 7.96 Pa 0.9375 minutes (~1 min) 109 dB 5.64 Pa 1.875 minutes (< 2 min) 106 dB 3.99 Pa 3.75 minutes (< 4 min) 103 dB 2.83 Pa 7.5 minutes 100 dB 2.00 Pa 15 minutes 97 dB 1.42 Pa 30 minutes 94 dB − − − − − − − − − −
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