초록 ▼

A photoacoustic speaker and method for producing photoacoustic sound by utilizing a laser beam, modulating the intensity of the laser beam in response to audio signal inputs and passing the modulated laser beam into a gas absorption chamber wherein gas capable of absorption of the modulated laser be

A photoacoustic speaker and method for producing photoacoustic sound by utilizing a laser beam, modulating the intensity of the laser beam in response to audio signal inputs and passing the modulated laser beam into a gas absorption chamber wherein gas capable of absorption of the modulated laser beam upon such absorption produces photothermic pressure waves corresponding to the audio signal inputs and which produce sound upon impingement on walls of the absorption chamber. The photoacoustic speaker achieves high fidelity sound reproduction and is capable of projecting a column of sound thereby providing an acoustic dimension effect.

대표청구항 ▼

A photoacoustic speaker comprising a laser beam source means, a modulating means capable of modulating the intensity of said laser beam in response to audio signal inputs producing a corresponding modulated laser beam, and an elongated sealed gas absorption chamber having a laser transparent window

A photoacoustic speaker comprising a laser beam source means, a modulating means capable of modulating the intensity of said laser beam in response to audio signal inputs producing a corresponding modulated laser beam, and an elongated sealed gas absorption chamber having a laser transparent window in one end in the path of said laser beam, a rigid end opposite to said window, said gas absorption chamber having elongated thin flexible side walls, said two ends and said flexible side walls confining gas capable of absorption of said modulated laser beam thereby producing pressure waves which impinge on said elongated flexible side walls of said chamber to produce sound and transmit said sound exterior to said chamber.