초록 ▼

A device for performing electroacoustic functions including noise cancellation, hearing aid, communication interface, headset, feed for recording device, and headphone functions. The device includes composite transducers connected to a control unit. The composite transducers can be mounted on a head

A device for performing electroacoustic functions including noise cancellation, hearing aid, communication interface, headset, feed for recording device, and headphone functions. The device includes composite transducers connected to a control unit. The composite transducers can be mounted on a headband and are configured to include input transducers for converting acoustic waves into electrical signals for processing by a control unit, and output transducers for converting the processed electrical signals to processed sound waves. The control unit includes an inverter/amplifier and a mixer/output amplifier for inverting the electrical input and controlling the gain for either adjusting the gain to maximize a noise cancellation function or increasing the gain beyond the minimum level heard by the ear to a desired level for a hearing aid function. Connectors for connecting recorders and a boom microphone, and function selection switches are provided by the control means for connecting circuit components of the control unit selectively for performing the above functions. The input and output transducers have oppositely oriented diaphragms mounted in a common plane to provide an inverted acoustic wave in real time for combining with and substantially cancelling an incoming acoustic wave.

대표청구항 ▼

An electroacoustic apparatus for performing multiple electroacoustic functions for the human ear and its hearing needs comprising: a composite transducer means including an input transducer means for converting received sound waves to corresponding electrical signals, an output transducer means for

An electroacoustic apparatus for performing multiple electroacoustic functions for the human ear and its hearing needs comprising: a composite transducer means including an input transducer means for converting received sound waves to corresponding electrical signals, an output transducer means for converting processed electrical signals to corresponding sound waves for input into a mixing means, said input transducer means and output transducer means being operatively aligned in the same plane for positioning the input transducer means close to the mixing means for receiving substantially the same received sound waves including any reflections received by the mixing means and a support means connected to the composite transducer means for supporting the composite transducer means in a selected position for receiving a portion of the received sound waves and for passing a portion of the received sound waves to the mixing means; and a control means including a circuit having an input means connected to the input transducer means for receiving selectively the electrical signals, a phase inverter means connected to the input means for inverting the phase of the received electrical signals, and an output means connected to the output transducer means for selectively outputting the inverted electrical signals to the output transducer means, said output transducer means being substantially aligned in the same plane of the input transducer means for generating processed sound waves corresponding to the received sound waves but 180 degrees out of phase with respect thereto for arrival at the mixing means at the same time the received sound waves arrive at the mixing means for substantial cancellation; wherein the control means input means includes a function selection means connected to the input transducer means for controlling the connection of the output of the input transducer means to the phase inverter means.