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Method for synthesizing a microphone signal

A microphone signal and microphone technology, which is applied in the direction of microphone signal combination, frequency/direction characteristic device, transducer circuit, etc., can solve the problems of unreal sound, metal feeling, useful signal bunching is not enough to eliminate total signal interference noise, etc. , to achieve the effect of increasing consistency

Active Publication Date: 2010-12-08
AKG ACOUSTICS
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  • Application Information

AI Technical Summary

Problems solved by technology

[0013] However, it has been proven that bundling the useful signal is not sufficient to remove interfering noise from the total signal and the perceived sound is unreal and metallic

Method used

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  • Method for synthesizing a microphone signal
  • Method for synthesizing a microphone signal
  • Method for synthesizing a microphone signal

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Embodiment Construction

[0042] Figure 1A A microphone arrangement 10 according to the invention is shown, which is made of two pressure gradient transducers 1 , 2 . The directional characteristic of the pressure gradient transducer consists of an omnidirectional part and a figure-of-eight part. In essence, this directional characteristic can be represented by P(θ)=k+(1-k)×cos(θ), where k represents the angle-independent omnidirectional part, and (1-k)×cos(θ) represents Angle-dependent figure-of-eight parts. Another mathematical description of the directional properties is dealt with further below. according to Figure 1B The directivity distribution of a single transducer depicted in , this case involves a gradient transducer with cardioid characteristics. In principle, however, all gradients derived from spheres and figures-of-eight, eg hypercardioid curves, are conceivable.

[0043] The gradient transducers 1, 2 in the practical example shown in the figure lie on a plane in which their main di...

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Abstract

The invention relates to a method for synthesizing a microphone signal from a coincident microphone arrangement, consisting of at least two pressure gradient transducers (1, 2), whose directional characteristic consists of an omni portion and a figure-of-eight portion, and which has a direction of maximum sensitivity, the main direction, with the main directions of the pressure gradient transducers (1, 2) being inclined relative to each other. In order to record a useful sound direction with high quality, starting from the Signals of two pressure gradient transducers (1, 2), a difference signal (f1 - f2) and a sum signal (f1 + f2) are formed, Signals (s1, s2) derived from the difference signal (f1 - f2) and the sum signal (f1 + f2) are transformed into the frequency range (S1(omega), S2(omega)) and subtracted from each other, independently of their phases, by spectral subtraction (40), and the forming signal is then provided with the phase (T1(omega)) of the signal (S1(omega)) originating from the sum signal (f1 + f2) before it is back-transformed into the desired time range.

Description

technical field [0001] The present invention relates to a method of synthesizing microphone signals from a coherent microphone arrangement, wherein the microphone arrangement comprises at least two pressure gradient transducers, the directional characteristics of the pressure gradient transducers include an omnidirectional part and a figure-of-eight part, and its There is a direction of greatest sensitivity, ie a main direction, wherein the main directions of the pressure gradient transducers are mutually inclined with respect to each other. The invention also relates to a microphone arrangement comprising at least two pressure gradient transducers, each pressure gradient transducer having a diaphragm, each pressure gradient transducer having a first sound inlet leading to the front of the diaphragm, and a second sound inlet to the back of the diaphragm, and wherein the directional characteristics of each pressure gradient transducer include an omnidirectional portion and a fi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04R1/38H04R1/40H04R3/00H04R1/08
CPCH04R2499/13H04R1/086H04R3/005
Inventor 弗雷德里克·里宁
Owner AKG ACOUSTICS
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