Heat Conduction, Fish and Ocean Sound Absorption

Dr Stephens' interest in heat conduction is re ected by contrasting some heat conduction e ects in atmospheric and ocean acousti.We concentrate on the oscillating heat transfer between the swimbladder gas of a fish and the surrounding fish tissue.which.together with loss in the tissue itself.allows propagating sound to be absorbed by dispersed numbers of sh.Shallow-water evidence comes from the long-term measurements otf Penanporth.and deepmter evidence comes from the recently-reported analyses of surface-duct transmission.Unfortunately support from other workers is still largely speculative or unreported.but the importance and widespread nature of this attenuation e 'ect should now be generally recognised.1.