The power of sound - Sound waves in "thermoacoustic" engines and refrigerators can replace the pistons and cranks that are typically built into such machinery
Sl. Garrett et S. Backhaus, The power of sound - Sound waves in "thermoacoustic" engines and refrigerators can replace the pistons and cranks that are typically built into such machinery, AM SCIENT, 88(6), 2000, pp. 516-525