Audio Attenuation Data
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Scan day: 09 February 2014 UTC
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Description: Why do close fireworks go 'pop' while distant ones go 'boom'? Here's a table showing frequency loudness loss for various distances and air humidities.
epanorama.net/Audio attenuation ePanorama.net - Audio Documents Here's some attenuation data, adapted from an NTIS report and taken from sci.electronics.design newsgroup: ----- dB/ft loss vs humidity @ 20 deg C (68 deg F) ----- frequency 0% 5% 10% 20% 40% 60% 80% 100% ========= ============================================================ 100 Hz 0.0005 0.0002 0.00016 0.00016 0.00013 0.0001 0.00008 0.00007 1 kHz 0.0007 0.006 0.0035 0.0015 0.0009 0.001 0.0011 0.0012 4 kHz 0.0027 0.023 0.031 0.027 0.0085 0.0057 0.0046 0.0041 10 kHz 0.008 0.031 0.061 0.080 0.047 0.031 0.023 0.019 20 kHz 0.023 0.049 0.086 0.172 0.155 0.114 0.088 0.072 40 kHz 0.081 0.116 0.152 0.250 0.380 0.364 0.313 0.270 80 kHz 0.315 0.367 0.404 0.508 0.754 0.900 0.926 0.888 ------------------------------------------------------------------------
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