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Message: <blockquote data-quote="helotaxi" data-source="post: 1538975" data-attributes="member: 550915">Speed of sound will only affect the possibility of standing waves inside the box, the SOS being higher in a denser medium would make the wavelength longer for a given freq.  A standing wave would be nearly impossible.  The noncompressibility of the medium in the box would not allow the sub to move inward at all.  Also, since the transmission of sound to the air requires enough vibration to compress and rarify the air and water won't compress, it wouldn't transfer low freqs to the air.We had an underwater system installed at college and you could better hear the PA system in the pool area while underwater than you could hear the transducer system while out of the water.</blockquote>

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