- Joined
- Sep 12, 2004
- Messages
- 56
my main question is that, do you think the sperm whale's hunting sonar can reach 223Db?
NOAA said:Amplitude of Example Sounds In Air (dB re 20µPa @ 1m)
and In Water (dB re 1µPa @ 1m)
threshold of hearing 0 dB --
whisper at 1 meter 20 dB --
normal conversation 60 dB --
painful to human ear 130 dB --
jet engine 140 dB --
blue whale -- 165 dB (in water)
earthquake -- 210 dB (in water)
supertanker 164 dB (in air) 190 dB (in water)
*note - sounds are in air unless otherwise noted
Cousteau said:Noise Source Noise Source Levels
Lightening Strike on Water Surface 260 dB (max)
Seafloor Volcanic Eruption 255+ dB (max)
Fin Whale 160-186 dB
Humpback Whale 175-190 dB
Bowhead Whale 158-189 dB
Blue Whale 188 dB (max)
Southern Right Whale 172-187 dB
Gray Whale 185 dB (max)
Source: SURTASS LFA Environmental Impact Statement