Marine Acoustics Tutorials

• NOAA Acoustics Tutorial
  
  
• Another NOAA Acoustics Tutorial
  
  
• marinebio.org SoundsoftheSea
  
  
• basic acoustics FAQ
  
  
• www.oceanmammalinst.com they focus on the acoustic protection of marine mammals
  4 songs online
  
  
• Dr. Ken Balcomb's 2001 letter to the US Navy on military sonars dangers to cetaceans:
  http://www.coreresearch.org/2003/sonar_and_cetaceans.htm
  
  
• TODO more here
  
  
• My Sound Pressure Level Analysis:
  
  Sound Pressure Level = 20 x lg (p/0.00002) dB
  
  Reference sound pressure (in air) = 0.00002 = 2E-5 Pa (rms) = 20 microPa
  
  reference sound pressure (in water) = 0.000001 = 1E-6 Pa
  
  root-mean-square: The RMS voltage of a signal is computed by squaring the instantaneous voltage, integrating over the desired time, and taking the square root.
  
  //p in rms = sqrt(sum(v[i]^2)/n)
  //v = array of 1024 voltage samples from a-to-d converter
  sum = 0;
  for(volt v : volts){
  sum += (v*v);
  }
  p = sqrt(sum/volts.length);