JPS6041360A - Loudening conference telephone system - Google Patents

Abstract

PURPOSE:To make it possible that interested persons in places distant from each other hold a loudening conference effectively, by cascading a required number of units, each of which includes a speaker connected to a receiving line through an amplifier, plural microphones, etc., to a telephone set. CONSTITUTION:A preamplifier mixer 3 which couples outputs of plural microphones 2 connected freely attachably and detachably by plug jacks, an adding amplifier 5 which couples the output of the mixer 3 and the transmission output from another unit, a receiving amplifier 6, a speaker 7, etc. are stored in a unit housing 1. A microphone 8 incorporated in one corner of the housing can be used instead of an external microphone 2. Input/output jacks 9 and 10 provided on the wall of the housing are constituted to store a transmission and reception line 11 and power supply and earth lines 13, and required units 1, 1' and 1'' are connected mutually and these units are connected to a common voice switch device 15 in consideration of the number of participants of the conference and the arrangement of their seats by connecting cables 14 adapted to both ends.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Technical Field of the Invention The present invention provides a system for transmitting individual chants held at a plurality of different locations into a single site via an m'IN circuit. This invention relates to an improvement in a loudspeaker conference telephone system that combines as is practiced in the United States.

(b) Technical background Although the development of transportation systems has significantly improved the sense of distance, their use still requires time and expense, and the losses increase in proportion to the number of people using them. .

In order to reduce the complexity and cost of holding a meeting with people from different business locations who are located in multiple locations separated from each other, alternative loudspeaker conference telephone equipment is being developed from an energy-saving perspective. is also stimulating demand.

(c) Prior art and problems Figure 1 is a block diagram showing an example of this pushing device that has been used in the past.
The devices installed in B, C, . . .
l, Ml', 8i2. IVJ2'@@-・MnlMn'
, mixer MIX1 common transmission amplifier Amp for this
II-, voice switch vs.
They are connected via communication wire via X.

Does the number of speakers and microphones depend on the number of conference participants meeting in the same area, seating arrangement, etc.? may be determined as appropriate,
During the meeting, there is no need to move speakers or microphones, and the number of speakers and microphones should be sufficient so that participants in other regions can hear what they are saying without any problem.

Therefore, the conference response ζ and the number of participants will be -par-1 each time, so the required number of speakers and microphones will also differ each time, and the appropriate number of transmitting and receiving common amplification), mixer MI The number of circuits used for X also differs.

Therefore, depending on the number of people participating in the conference, various types of conference equipment equipped with micro speakers and speakers of appropriate size are required, and if the scale is determined based on the maximum number of β participants that can be considered, generally speaking, This results in extremely uneconomical usage conditions.

(d) Purpose of the Invention The present invention eliminates the above-mentioned drawbacks of the conventional system and provides a device of this type that can always be configured with the minimum necessary capacity regardless of the number of participants in the ceremony. “Its purpose is to

(e) Structure of the Invention The above-mentioned object of the present invention is to provide a device for performing a public address conference by connecting a microphone and a speaker to a telephone device; a preamplifier mixer that combines the output of a plurality of microphones with a speaker connected to a reception line via an amplifier; and an amplifier for merging the output of the preamp mixer and the output of the microphone from another unit and outputting it to the telephone device side via a transmission line; A public address conference telephone device is achieved by connecting a required number of terminals to each other.

A microphone is required for each participant, but the speaker can be shared by several of the 11 participants, or 5 to 6 people in a typical seating arrangement. Therefore, 1 speaker and 5 to 6 micro 7-on-7 units constitute one unit.The speaker unit is a common unit for each unit with one fluorescent amplifier and multiple microphones. An amplifier and mixer are also housed in the unit.

To scale up the 14WJ or two or more other units, a summing amplifier is used to combine the microphone outputs of each unit into a single output without interfering with each other. Since it is easy to make the input level of the summing amplifier the same and the output of the amplifier equal to the level, regardless of the number of units to be combined, a commonly used voice switch (e.g. VOAS
;Voice Operated Device Ant
The microphone output given to i-8ingingJ is always constant.

Since the speakers housed in each unit are individually equipped with amplifiers, the desired output can be obtained regardless of the number of combined units.

In this way, the power required for each unit can of course be built into each IPH, but it is also possible to obtain it from a common power supply.Including the necessary connection wires and transmitting/receiving wires, it is possible to use a couple of wires. For use with connection plugs on both ends,
1 By providing connection jacks compatible with the plugs on the left and right sides of a solid unit housing, the desired number of devices can be connected in sequence according to the size of the conference to easily and economically configure the desired conference system. .

(Embodiments of the Invention The present invention will be specifically explained below with reference to the drawings.

Figure 2 is a block diagram showing the configuration of the unit according to the present invention.Inside each unit case is a preamp mixer that combines the outputs of several microphones 2 that are detachably connected with plug jacks. 3, an adder 5 which combines its output with the transmission output of the oil unit power), a receiver J? ! A width transducer 6, a speaker 7, etc. are accommodated. Microphones 8 built into the four corners of the housing can be used in place of the external microphone 2. (Incidentally, the built-in microphones may be microphones in two corners located diagonally. Regarding the technology of the built-in microphones, refer to Japanese Patent Application Laid-Open No. 58-565641 filed by the same applicant.) Input/output provided on the cylinder wall Jack 9, IO is transmission/reception multiplication 11,1
2. By means of a connecting cable 14 which accommodates a power source liner 3 and has matching connecting plugs at both ends, the number of conference participants at the same location, and sometimes the number of seats, as shown in the block diagram in FIG. ', :Unit 1.1', 1 "interconnection 46(";
A connection is made with the voice switch device 15 of the t, : and co-star. The line 16 is connected to a voice switch device 4' at the main exchange facility, .DELTA.5, or oil station, not shown.

As described in the detailed description of the invention, the loudspeaker system according to 4) of the present invention can be used as appropriate units depending on the size of the event. In this way, it is possible to easily obtain an acidic 7s-like composition, which has a wonderful practical effect.

4. Simple Explanation Figure 1 shows an example of a conventional 4-piece loudspeaker system, Figure 2 shows an example of a unit used in the present invention, and Figure 3 shows an example of a unit used in the present invention. The figure shows the desired skin pattern (and precepts) using several units as a block diagram.

In the figure, A, B, C...M are different locations, E
X is a switching device, VS and 15 are voice switches, 1,
], ',1'' is a unit housing, 2.8 is a microphone, 3 is a preamp mixer, 5 is an amplifier, 7 is a speaker, 9 and 10 are input/output connection jacks, 14
does not indicate a multi-conductor continuous cable.

Agent: Patent attorney Hirosei Matsuoka, ')? r′・j 1 tsubo --Yo Hiro 2nd ? ]

Claims (1)

[Scope of Claim] A device for conducting a public address meeting by connecting a microphone and a speaker to a telephone device; a preamp mixer that combines a speaker connected to a telephone line via an amplifier, a plurality of microphone outputs, and the preamp mixer. and the output of the microphone from the other unit, the transmission line is connected to the telephone device 1111.
1 and the amplifier #j'a which outputs to 1 are housed in one unit. A loudspeaker conference telephone device, characterized in that the unit is connected to the telephone device in a subordinate manner.