optoacoustic
/ˌɒptəʊəˈkuːstɪk/Physics
adjective
Of or relating to both light and sound; specifically designating or relating to an effect whereby a light beam periodically interrupted at an audio frequency produces an audible sound when made to irradiate an enclosed body of gas; photoacoustic.
Origin
1970s; earliest use found in Journal of Applied Physics. From opto- + acoustic.