Top Definition
When you receive music or any other sort of sound that you don't want to hear through means that aren't under your control. Secondhand sound waves are often contracted in stores or other people's cars.
Alan: Dude, will you change the station? I'm dying of secondhand sound waves over here.
Dave: Yeah, sorry man. I forgot you don't like Greenday.
by Deux March 19, 2012

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