I have been through a number of earthquakes in Tokyo, but the sounds that I remember are falling odds and ends, not from the earthquake itself.
Over here http://www.oyo.co.jp/service/taisyou/jisin/oto/oto00.html there is a page in Japanese which talks about the sound of the earthquake itself. It says the frequency is down about 10 hertz, while human hearing only goes down to about 20 hertz. They have several actual recordings of earthquakes there, shifted up slightly to make them easier to hear.
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ninetydegrees
Earthquake sounds
2007-12-10 01:32 (UTC)Over here http://www.oyo.co.jp/service/taisyou/jisin/oto/oto00.html there is a page in Japanese which talks about the sound of the earthquake itself. It says the frequency is down about 10 hertz, while human hearing only goes down to about 20 hertz. They have several actual recordings of earthquakes there, shifted up slightly to make them easier to hear.
Hope that helps.