System and method for sending sound with two different frequencies at the same time using one energy converter

A transducer and frequency technology, applied in radio wave measurement systems, instruments, electroacoustic musical instruments, etc., can solve the problems of large physical size and high cost of transducers, and achieve reduced production costs, easy phase control, and reduced The Effect of Size and Power Consumption
CN1790480AInactive Publication Date: 2006-06-21INST OF ACOUSTICS CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
INST OF ACOUSTICS CHINESE ACAD OF SCI
Publication Date
2006-06-21
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

The invention discloses an energy converter to launch two different frequency sound sources, which comprises the following parts: broad-band energy converter, controller, feeding power, D-type power amplifier, waveshape data list storage and address generator, wherein the controller coordinates each part to work simultaneously, which controls the pulse breadth and repeating times per second of sound signal and outputs the order to the address generator and D-type power amplifier; the address generator outputs the data address to the waveshape data list storage, which outputs the data to the D-type power amplifier; the D-type power amplifier connects the broad-band energy converter, which supplies enough power to drive the electric power; the broad-band energy converter transmits the electric power into sound power to launch out.
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Description

technical field

[0001] The invention relates to a sound source, in particular to a sound source which utilizes a transducer to emit sounds of two different frequencies simultaneously. Background technique

[0002] Sound sources with small size, low frequency and good directivity are useful in many ways, and the sound source of parametric array sonar has these characteristics. In parametric array sonar equipment, it is required to transmit two original frequency sound signals f with relatively close frequencies 1 , f 2 . After the two original frequency sound signals are transmitted into the water medium, due to the nonlinear effect of the water medium, there will be combined frequency and difference frequency phenomena. Since the combined frequency is much higher than the difference frequency, it will be quickly absorbed by the medium. The difference frequency can propagate a relatively long distance because the medium absorbs it less. Therefore, the difference frequenc...

Claims

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