ePanorama.net - Audio Documents

Audio attenuation data

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
------------------------------------------------------------------------