JPS5844890A - Handset unit having directivity - Google Patents

Abstract

PURPOSE:To improve the articulation, by collecting sound so as not to deteriorate signal spectrum of voice, through the insertion of an emphasis circuit which corrects the deterioration of signal level at high frequencies to a mixed output of microphones arranged in a line. CONSTITUTION:Uttered voice is collected with all microphone units 4-1-4-n, and amplified by preamplifiers 7-1-7-n respectively and mixed at a mixing circuit 8 to be one output and given to an emphasis circuit 11. The emphasis circuit 11 amplifies a signal level of an output signal given from the mixing circuit 8 with emphasis only to the component with a specific frequency band and transmits the signal to a transmission terminal 10. Thus, the gain versus frequency characteristic of the circuit 11 corrects the reduction in the signal level at this frequency and makes the frequency characteristic of the mixed output of collected sound flat. Thus, since the signal spectrum of uttered voice can be collected without deterioration, conference and lecture with excellent articulation can be performed.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a meeting 1 for a large number of people in the same room, a purchasing party,
I have an audience with the Kasu same-sex transmitter/receiver unit, which has an integrated structure of a microphone section and a speaker section, which is used for h4 study sessions or meetings with remote locations.

Conventionally, in this type of directional transmission and reception, the outputs of each microphone unit mounted at equal intervals on a mounting base in a straight line are weighted using a Hanning window, and then mixed and used as a collected sound output. Therefore, when the frequency of the sound wave is low, the wavelength is long, and when the sound wave is short and high frequency, each microphone unit does not pick up the sound equally, and the mixed output becomes a high frequency sound wave. There were 3b drawbacks of being smaller.

This is because when the generated voice is collected by a conventional directional transmitting/receiving unit, the 100 spectrum of the original sound is reduced by the directional transmitting/receiving unit. There was a major drawback, mainly due to deterioration.

The purpose of the present invention is to remove the above-mentioned defects by inserting the circuit in series, which will be described later, into a mixing circuit that mixes the output signals of all the microphones, and to prevent the signal spectrum of the original sound from deteriorating completely. The objective is to provide all homologous transmitting and receiving units that can pick up sound without any noise.

The non-invention is @a linear mounting base, a microphone pusher in which a plurality of microphone units are arranged at equal intervals on a linear axis of the mounting base, and a microphone pusher on the same axis from the microphone pusher on the linear axis of the linear mounting base. In a directional transmitting/receiving unit configured as an integral structure with a speaker section in which a speaker as a receiving sound source is arranged at a position separated by an arbitrary distance from above, the m-force signal of each micro unit of the microphone pressing section is Mixing time to mix everything lol! This is a directional transmitting/receiving unit in which a circuit is inserted in series to emphasize the entire signal level only for components within a specific frequency band.

Next, a description will be given of a row of figs according to the present invention with reference to all the drawings.

FIG. 1 shows an implementation of the directional transmitting/receiving unit of the present invention V/! I
FIG. 2 is a circuit diagram showing an implementation of the directional transmitting/receiving unit of the present invention.

1 and 2, 1 is a mounting base, 2 is a linear mounting base, 3 is a microphone pusher, 4-1 to 4-n are microphone units, 5 is a speaker unit, 6 is a speaker, 7-
1 to 7-n are preamplifiers, 8 is a mixing circuit, 9 is a transmitter terminal, 10 is a receiver terminal, and 11 is an emphasis circuit.

Here, implementation 1+lJ of the inventive directional transmitting/receiving unit will be described with reference to FIG. Speech sounds are collected by all the microphone units 4-1 to 4-n, amplified by each preamplifier 7-1 to 7-n, and then mixed by the mixing circuit 8 to become one output and sent to the emphasis circuit. given to 11. (The emphasis circuit 11 is the mixing circuit 8.) Is the entire given output polarization only for the components within a certain frequency band? It is emphasized, amplified, and sent to the transmitting terminal 10.

In general, if the emphasis circuit 11 in the circuit configuration of this embodiment is not provided, the frequency characteristic of the collected mixed output becomes smaller as the frequency increases.
Does the gain frequency characteristic of the signal level drop in this high frequency range? The frequency characteristics of the mixed output of the collected sound are determined to be corrected and flat.

In general, when determining the interval between microphone units and the quantity of microphone units, it is assumed that this product will be used for calls in the entire telephone band. , the signal level of high frequencies is reduced by a factor of several decibels per octave. −
Just in case. The signal applied to the receiving terminal 10 is converted by the speaker 6 into a received voice.

As explained above, the directional transmitting/receiving unit of the present invention can collect speech without deteriorating the signal spectrum of speech, so that meetings, lectures, etc. can be held with extremely high clarity. In addition, when used as a microphone for all lectures with the uninvented directional transmitter/receiver unit, the expansion F! It goes without saying that similar effects can be obtained when used as a microphone or speaker for telephones and conference telephone devices.

As explained above, the present invention is used for mixing linearly arranged microphones, and by inserting in series an emphasis circuit that completely corrects the deterioration of the signal V level in the high frequency range, the 1d spectrum of the speech voice is degraded. It has the effect of being able to collect sound without having to listen to a meeting, and realize meetings, lectures, loudspeaker calls, and conference calls with good clarity.

[Brief explanation of drawings]

FIG. 1 is a structural diagram showing an entire implementation array of a directional transmitting/receiving unit according to the present invention, and FIG. 2 is a circuit diagram showing an embodiment of the present invention. 1... Installation base, 2... Wandering rock-shaped mounting base, 3... Microphone push part, 4-1 to 4-n.
...Microphone unit, 5...Speaker Ql, 6...Speaker, 7-1 to 7-n...
...Preamplifier, 8...Mixing circuit, 9...
...Talking terminal, 10...Receiving terminal, 116
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Claims (1)

[Claims] A linear mounting base for a transmitting/receiving unit for use in conferences, etc., a microphone group portion comprising a plurality of microphone units arranged at equal intervals on a linear axis of the mounting base, and the linear mounting base. In the directional transmitting/receiving unit configured as an integral structure, a speaker is disposed as a receiving sound source at a position separated from the microphone section on the same axis by an arbitrary distance, and the microphone group 7) Directivity characterized by having a circuit that emphasizes all signal levels for components within a certain frequency band connected in series to a mixing circuit that mixes the two-power signals of each microphone unit. Transceiver unit.