RU2332808C2 - Method of loud-speaking communication - Google Patents

Abstract

FIELD: physics.

SUBSTANCE: method realises full, as in usual telecommunication, duplex, by providing the first user speech interruption by the second user speaking without pauses from the other line end at average loudness on receiving line end not less than sixty decibels relative to zero sound pressure. Thus, the second user interrupting speech of the first user is not less than three metres away from electro-acoustic converters. Such a quality of loud-speaking communication is achieved due to electro-acoustic sound radiator propagating speech vibrations perpendicularly to speech vibrations received by electro-acoustic sound receiver with symmetry axes of diagrams of speech vibrations orientation of electro-acoustic sound radiator and electro-acoustic sound receiver in one plane, electro-acoustic sound radiator and electro-acoustic sound receiver being acoustically isolated inside of loud-speaker casing.

EFFECT: considerable intensification of transmit-receive paths, simplification of circuit design of telephone set assemblies.

3 dwg

Description

The invention relates to a hands-free communication method and can be used both in wired communication with any type of telephone, and in mobile communication with any type of mobile phone used in transport, in offices and at home, eliminating the harmful effects of EMR on human brain and without changing the design and circuit parameters of cell phones in contrast to the proposals [1], [2].

A known method of conditional duplex speakerphone, built on the principle of switching from the voices of the subscribers of the transceiver amplifier paths in devices with speakerphone. See, for example, [3] and as a special case of [4]. However, this method, despite complex circuit solutions, has the fundamental drawback that it does not allow the interruption of the speech of a subscriber speaking without pauses from the other end of the line by a subscriber with a speakerphone at the receiving end of the line. Incomplete alternate locking of voice signals from voice subscribers in amplification paths of loud-speaking communication does not allow to obtain a volume level of at least sixty decibels relative to zero sound pressure level at a distance of at least three meters from the subscriber’s electro-acoustic transducers at the receiving end of the line. Consequently, it is almost impossible to implement full duplex in loud-speaking communication with the indicated parameters using circuitry alone.

Realization of a full duplex in loud-speaking communication with the indicated parameters is possible with the help of the optimal spatial orientation of the symmetry axes of the sound radiation patterns of the receiving and transmitting electro-acoustic transducers, as well as their acoustic isolation inside the loudspeaker unit.

A known attempt to solve this problem in the US patent with a directional microphone [5]. However, this attempt does not allow to obtain full duplex in full due to the lack of spatial orientation of the symmetry axes of the sound radiation patterns of the receiving and transmitting electro-acoustic transducers in one plane and the poor acoustic isolation of the transducers inside the speakerphone case. As a result, the acoustic attenuation between the transmitting and receiving (and) electro-acoustic transducers is not enough to obtain full duplex. This is confirmed by the circuit shown in the patent [5], which switches transceiver amplifier paths with adaptation filters from the voices of subscribers, which suppresses acoustic feedback signals and feedback signals through an isolation device. A similar circuit with PCM in telephone communication is given in the patent [4].

The purpose of the invention: simplification of circuit solutions and obtaining full duplex in loud-speaking communication with the average volume level of speech signals transmitted by subscriber A from the other end of the line, at least sixty decibels relative to zero sound pressure level - 2 · 10 ^-5 Pa and the distance of the subscriber B speaking through a loud-speaking device to the other end of the line, at least three meters.

This goal is achieved by the fact that the axis of symmetry of the directional patterns of transmitting and receiving sound signals of electro-acoustic transducers are oriented perpendicularly in one plane with simultaneous acoustic isolation inside the speakerphone case.

Figure 1, 2, 3 illustrate examples of the implementation of this method.

In Fig.1 in relation to wired communication. Here: 1 - the case of the speakerphone of subscriber B; 2 - axis of symmetry of the sound pattern of the loudspeaker 3 with internal acoustic insulation 4; 5 - axis of symmetry of the sound pattern of the microphone 6, perpendicular in one plane to the sound pattern of the loudspeaker 3; 7 - internal acoustic isolation of the microphone 6; 8 - amplifier for the transmission of speech signals; 9 - amplifier receiving speech signals; 10 - a device that decouples the transmitted speech signals to the telephone line and receives speech signals from the telephone line; 11 - ATS: 12-telephone of subscriber A.

Figure 2 in relation to a cell phone. Here: 1 - speakerphone case; 2 - axis of symmetry of the sound pattern of the loudspeaker 3 with internal acoustic insulation 4; 5 - axis of symmetry of the sound pattern of the microphone 6, perpendicular in one plane to the sound pattern of the loudspeaker 3; 7 - internal acoustic isolation of the microphone 6; 8 - amplifier for the transmission of speech signals with the possibility of its exclusion in the speakerphone 1 in the presence of sufficient amplification in the cell phone 10; 9 - amplifier receiving speech signals; 10 - a cell phone.

Figure 3 in relation to wired communication with a telephone to increase the volume during the transmission and reception of audio speech signals. Here: 1 - loud-speaking device; 2, 3 - axis of symmetry of sound radiation patterns of loudspeakers 4 and 5; 6, 7 - symmetry axis of sound radiation patterns of microphones 8 and 9; with 2.7; 7.3; 3.6; 6.2 - axis of symmetry of sound radiation patterns pairwise perpendicular in the same plane; 10 - telephone; 11 is a switch that passes voice signals from the telephone network via cable 12 to the speakerphone 1 or to the telephone 10 through cable 13;

Information sources

1. RF patent 2169434, 7H04M 1/03, 12/28/1998. Authors: Betsky OV, Lebedeva NN, Posmitny C.B. [RU]; patent holder: Closed Joint-Stock Company "MTA - KVCh" [RU].

2. RF patent 2237376, 7Н04М 1/03, 04/03/2003. Posted by: Pankov B.T. [RU]; patent holder: Pankov Valery Tikhonovich [RU].

3. A.I. Kizlyuk "Handbook on the device and repair of telephone sets of foreign and domestic production" M .: ANTELCOM, 2003, pp. 110-117.

4. RF patent 2211543, 7Н04М 1/20, Н04В 3/20, 08/27/1999. Author: Zae-Ming Park (KR); patent holder: SAMSUNG ELECTRONICS CO., LTD (KR).

5. US patent 5121426, H04M 1/20, H04R 1/32, 06/09/1992. Authors: John C. Baumhauer, Jr., et al. [US]; patent holders: A&T Bell Laboratories, Murray Hill, N.J. [US].

Claims (1)

A loud-speaking communication method including an electro-acoustic sound emitter located in the housing of a loud-speaking apparatus that propagates sound vibrations of speech, and an electro-acoustic sound receiver that receives sound vibrations of speech, characterized in that for obtaining full duplex with an average level of speech volume of the first subscriber through the electro-acoustic sound emitter at least sixty decibels relative to the zero level of the sound pressure - 2 10 ^-5 Pa at a distance from the second subscriber electro of a acoustic acoustic receiver of at least three meters, an acoustic acoustic emitter propagates sound vibrations of speech perpendicular to the received acoustic sound vibrations of an electro-acoustic sound receiver with axes of symmetry of radiation patterns of speech acoustic vibrations of an electro-acoustic sound emitter and an electro-acoustic sound receiver in one plane, wherein the electro-acoustic sound emitter and the electro-acoustic sound receiver acoustically isolated inside the speakerphone enclosure.

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