sound propagates minimum in
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Therefore, between the deep isothermal region and the mixed layer, there is a minimum sound speed; the depth at which this minimum takes place is referred to as the axis of the deep sound channel. However, in polar regions, the water is coldest near the surface so that the minimum sound speed is at the surface.
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Answer:
Therefore, between the deep isothermal region and the mixed layer, there is a minimum sound speed; the depth at which this minimum takes place is referred to as the axis of the deep sound channel. However, in polar regions, the water is coldest near the surface so that the minimum sound speed is at the surface.
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