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Horizontal orientation acoustic source location method

A technology for sound source localization and horizontal orientation, applied in audiometers, diagnostic recording/measurement, medical science, etc., can solve the problems of difficulty in introduction, high cost, complex structure of research equipment, etc., to reduce sound distortion and ensure reliability. sexual effect

Active Publication Date: 2010-06-09
王永华
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  • Claims
  • Application Information

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Problems solved by technology

[0004] Due to the complex structure and high cost of research equipment, it is difficult to introduce. In China, only Shanghai Liang Zhian started research in this field in the 1960s and 1970s. There are no more people involved in this field, and it is not very well integrated with clinical research. ideal

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Embodiment Construction

[0012] The realization of the present invention needs to be equipped with one standard soundproof room, one computer (with printer interface), eight loudspeakers (with eight brackets), one audiometer, one sound level meter, a corresponding testing software programming system, and other related connections. Wire (breadboard, interface wire, etc.). Corresponding test software programming system of the present invention mainly comprises five parts when designing: 1. two routes are manual control route and random control route; 2. the duration of the sound, the unit is ms; 3. the interval time of the sound, the unit is s ; ④ The number of occurrences of each test unit; ⑤ Start button.

[0013] see figure 1 , every kind of test that the present invention carries out is all carried out under the darkroom environment, to remove the influence of vision, first set up corresponding parameter, every 45 ° is provided with 1 loudspeaker 1 (a sound source) on the XY plane coordinate system...

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Abstract

The invention relates to a method for sound source localization based on horizontal audiometry. The method comprises the following steps: (1) in a standard sound-insulating dark room, eight loudspeakers are distributed uniformly in a circle with a 50 cm radius, a test subject is the centre of the circle and at the same height as the circle, and the included angle of two adjacent loudspeakers is kept at 45 degrees; (2) eyes of the subject are covered with a black fabric; (3) one of the eight loudspeakers is randomly allowed to make a sound for 40 microseconds with a time interval of 5 seconds,totally 100 times in one test cycle; and (4) the total error is calculated, which is the sum of absolute values of difference between actual position and estimated position of the sound source in thetotal 100 tests, and the test accuracy rate is calculated, which is the percentage of times when the subject accurately judges the sound source position. The method is simple and feasible, and has high test accuracy and complete functions.

Description

technical field [0001] The invention relates to a sound localization method, in particular to a horizontal azimuth audiometry sound source localization method. Background technique [0002] Human beings have been studying sound localization for a long time, and there are certain researches on this aspect both at home and abroad. The principle of sound spatial localization: the human ear's spatial localization of the sound source is the result of the auditory system analyzing and synthesizing the time difference (phase difference) and intensity difference between the two ears' perception of sound. The central problem of auditory sound, one is the feeling of sound; the other is the analysis of the sound signal (distinguish frequency, intensity, sound quality, time course and direction of sound source). As a general concept, sound localization includes positioning in both direction and distance. [0003] There are three main factors that affect sound localization. 1. The dis...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B5/12A61B5/00
Inventor 王枫
Owner 王永华
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