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Directional loudspeaker

A technology of directional speakers and audio speakers, applied in the direction of sensors, transducer circuits, sensor components, etc., can solve the problems of thick thickness and large size, achieve high sound pressure, reduce production material costs, and reduce the overall thickness.

Inactive Publication Date: 2012-04-04
王建清
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This ultrasonic transducer unit includes components such as a shell and a base, and the directional loudspeaker composed of a plurality of such ultrasonic transducer units has a large size and a thick thickness, and is not suitable for use in portable electronic products

Method used

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Embodiment Construction

[0012] The present invention will be further described below in conjunction with the accompanying drawings.

[0013] The directional loudspeaker of the present invention includes a plurality of ultrasonic transducer units 100 and a circuit substrate 200 , and the plurality of ultrasonic transducer units 100 are arranged on the circuit substrate 200 . The plurality of ultrasonic transducer units 100 can be arranged on the circuit substrate 200 in various ways to form ultrasonic transducer arrays of different shapes, such as triangular, square, parallelogram, hexagonal and so on. In one example, as in image 3 As shown, four ultrasonic transducer units 100 are arranged on the circuit substrate in a 2×2 manner; and in Figure 4 In , the shape of the ultrasonic transducer array is hexagonal.

[0014] Each ultrasonic transducer unit includes a transducer element that converts electrical signals into ultrasonic mechanical vibrations. The transducer element includes a first electro...

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Abstract

The invention discloses a directional loudspeaker, which comprises a plurality of ultrasonic transducer units and a circuit substrate. The plurality of ultrasonic transducer units are arranged on the circuit substrate, each ultrasonic transducer unit comprises a transduction element converting electrical signals into ultrasonic mechanical oscillations, the transduction element comprises a first electrode and a second electrode, the transduction element is fixed on the circuit substrate, and the first electrode and the second electrode of the transduction element are connected with the circuit substrate through a lead respectively. The directional loudspeaker is small in volume and particularly suitable for portable electronic products.

Description

technical field [0001] The invention relates to a small directional sound source, more specifically, to a directional loudspeaker suitable for portable electronic products. Background technique [0002] The working principle of the ultrasonic directional speaker is: the audio signal to be transmitted is modulated on the carrier signal of the ultrasonic frequency, and then emitted by the ultrasonic transducer. Due to the nonlinear acoustic effect of the air, the audio signal in the sound wave will be self-demodulated during the propagation process and can be directly heard by the human ear. Due to the super-directivity of ultrasonic propagation, the audible sound superimposed on the ultrasonic wave also has good directivity, so this sound source is called an ultrasonic directional speaker. The sound propagation of traditional speakers is divergent and non-directional, which will inevitably cause mutual interference of sounds. Directional sound sources have a wide range of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04R1/32H04R3/00
Inventor 王建清乐秀海王跃民宋甘亮闻心月张洁伟
Owner 王建清