title: The effect of temperature on sound wave absorption in a sediment layer.
abstract: The effect of temperature on sound velocity, absorption, and reflection coefficient in the seabed sediment layer is investigated. Experimental measurements of sound speed, absorption, and the reflection coefficient in a sandy sediment layer have been carried out at several temperatures. An absorption reduction of 75 dB/m and a velocity increase of 65 m/s have been measured at a frequency of 1 MHz when the temperature increases from 5 to 25 degrees C. Because of the absorption temperature dependence the amplitude of the reflected wave from the back surface of the sub-bottom layer after going back and forth across the layer increases with the temperature.
authors.affiliation: Instituto de Acústica (C.S.I.C.), Madrid, Spain. iaccf31@fresno.csic.es
authors.forename: R
authors.initials: R
authors.lastname: Carbó
authors.forename: A C
authors.initials: AC
authors.lastname: Molero
mesh_terms: D000162:Acoustics; D006801:Humans; D009791:Oceanography; D013696:Temperature; D014465:Ultrasonics