DE3315326A1 - Epitaxial stereophony - Google Patents

Abstract

The stereophonic transmission of a voice is possible with the aid of epitaxial stereophony. The XY and MS techniques transmit these signals in mono, AB is incompatible. Three microphones are used for recording. The epitaxial microphone is placed in front of the interpreter with two further microphones located symmetrically adjacent to it at a distance which should not be less than 2 m. Due to their different phase angle, the two outer microphones ensure that the movement of the interpreter is audible, the epitaxial microphone (Greek epitaxis - the arrangement) forms the mid-point of an electro-acoustic bridge circuit and undergoes no phase shift. This mono signal is superimposed on the outer signals and ensures compatibility. The degree of superimposition amounts to only a few per cent and is responsible for the stereo character. The ET signal loses its independence on the transmission path and regains it only in the brain of the listener. It cannot be detected through measurement in the two stereo channels. The ET signal can be shifted on the base by delaying one channel. <IMAGE>

Description

E P I T A X I A L - S T E R E O P H O N I E

There is no stereophonic transmission of a single voice she always comes from the middle. One loudspeaker is sufficient for midrange reproduction. A stereo headset gives the brain a mid-range impression. The XY stereophony conveys a solo voice in a mono receiver (Greek monos - alone). the AB -Jtereophonie cannot be transmitted monophonically, it is not compatible (not compatible).

For these reasons, one should opt for stereophonic transmission Agree on all known procedures.

However, epitaxial stereophony allows stereophonic transmission one voice and is also fully compatible. (Latin: compatiztogether to suffer) Man both channels together, i.e. mono, can suffer.

Epitaxial stereophony is a combination of three microphones, hereinafter referred to as converter. Two of them can be switched in AB technology, the third is placed in front of the speaker and epitaxially to the AB-Nandlarn (Greek epitisso - place next to it).

We use three converters. These are the A converter and the B converter and the epitaxial converter, called the ET converter. In addition, two of the same kind are resisted and a potentiometer used.

he ranks A and B are fully sus-controlled. The ET signal is over the resistances, which serve to decouple A from B, subjectively via the @otentiometer @ fed to the stereo channels A and B. A headphone is used as a control. The ET part is only a few percent and cannot be measured in the @ B channels. However, it forms anew in the brain when it is reproduced and leaves together with the A and B signals give an extremely differentiated sound. In this context be to the stereo matrix method (no 38kHz Drüger) and not to the remembers existing color carrier of 4.43MHz (PAB system).

The ET signal does not experience any phase shift. The ET converter owns a cardioid characteristic, the AB converter spherical. Between the AB converters we have no phase shift when the speaker is looking straight ahead. We transfer a mono signal. If he turns his nose 3cm to the A converter, he moves away at the same time 3cm from the B-converter it moves 6cm on the base A B. This leads to an L-phase shift between A and B. It shows itself differently to the converters (Greek phainomai - itself demonstrate). These signals are delayed by both of them from the malfunction center in the brain Ears receive: the brain can determine the direction. In a mono receiver the dignale A and B are interconnected to a mono signal, which is used at E @ rer does not cause shock, It is compatible: he can suffer it together.

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Claims (1)

P a t e n t a n s p r u c h My patent claim relates to the fact that the ET signal of a voice is undetectable on its way to the listener is, but only reappears in the brain in connection with the A B - signal. My p a t e n t refers to this method of transfer claim.