title: Optical measurement of the speed of sound in air over the temperature range 300-650 K.
abstract: Using laser-induced thermal acoustics (LITA), the speed of sound in room air (1 atm) is measured over the temperature range 300-650 K. Since the LITA apparatus maintains a fixed sound wavelength as temperature is varied, this temperature range simultaneously corresponds to a sound frequency range of 10-15 MHz. The data are compared to a published model and typically agree within 0.1%-0.4% at each of 21 temperatures.
authors.forename: R C
authors.initials: RC
authors.lastname: Hart
authors.forename: R J
authors.initials: RJ
authors.lastname: Balla
authors.forename: G C
authors.initials: GC
authors.lastname: Herring
mesh_terms: D000162:Acoustics; D006801:Humans; D013016:Sound; D013696:Temperature