Acoustic wave generator employing fluid injector

摘要

To reproduce sound in an extremely compact size, fluid injectors are used that can generate fluid flow sufficient to create a desired acoustic pressure wave, but which fluid flow operates in a manner that is decoupled from the desired acoustic pressure wave. Fluid flow within the fluid injectors needed to generate the desired acoustic pressure wave need not be directly proportional to the frequencies of the desired acoustic pressure wave. The fluid injector has a control input capable of altering fluid flow relative to a received control signal, which is generated by a controller in response to an electrical signal. The fluid injector produces fluid flow outward and inward in response to the control signal, thereby creating an acoustic wave proportional to the electrical signal. The devices herein may employ valves or not. Synthetic jets may also be used.

主权项

1. An apparatus for producing an acoustic wave comprising:
a fluid injector to generate the acoustic wave in response to a signal representative of a desired acoustic wave; and a controller directly modulating the fluid injector based on an electrical signal representing the desired acoustic wave, wherein the fluid injector comprises: an enclosure having a cavity; a diaphragm disposed inside the enclosure.