DE3115923A1 - Intercom device - Google Patents

Abstract

An intercom device has an ear insert with a device such as a microphone which receives oscillations and which is combined with a loudspeaker, and a housing part in which an automatic sound control circuit for automatic control of the power levels of transmit and receive signals is connected to one of the electric circuits of the device, the ear insert and housing being electrically connected via a wired or wireless link.

Description

Andrejewski, Honke & Partner, patent attorneys in Essen

The invention relates to a counter-spraying device, consisting from an ear tip and one; Housing with electrical circuits arranged therein.

In the case of back-to-back speakers of this type, a Vibration-absorbing ear microphone, which will hereinafter be referred to simply as ear microphone, in the outer The auditory canal of one ear of the user is used and is used to record the speech signals (vibrations) which are transmitted through the bones are directed around the outer auditory canal, such an ear microphone already published by the inventor became. Such an ear microphone can be equipped with a loudspeaker such as a conventional sound pressure receiver or the like. Can be combined.

In the case of a manufactured combination of an ear tip, which is the ear microphone and the acoustic pressure loudspeaker or headphones contains, an attempt was made to transmit and receive in a very noisy environment with a standard FM transceiver, however, there were the following shortcomings.

Based on previous experience, it has been assumed that no howling or whistling occurs even with loud sounds from the loudspeaker because only vibrations transmitted through the bones would be picked up by the ear microphone. But when the volume of the loudspeaker to, for example, δθ-100 dB has been increased to without difficulty-even in very noisy surroundings To be able to hear, it was found that the sounds from the loudspeaker were poorly picked up by the ear microphone and howling or whistling sounds occurred.

Andrejewski, Honke & Partner, patent attorneys in Essen

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It was also found that when the loudspeaker output level was increased for transmission in a noisy environment, the user's ability to think has been impaired.

The invention has therefore set itself the task of the aforementioned Disadvantages of an intercom of the type mentioned to eliminate the following requirements Fulfills:

(1) Use of the ear microphone in the facility's transmission system to eliminate background noise and clear speech signals to be transmitted if it is used in a very noisy environment at, for example, 110 dB (A);

(2) Combination of the ear microphone with that in the receiving system

the device used loudspeakers to make the connection, and \ Although simultaneous speaking and listening, via at least one ear! reach the wearer so that his hands are free for any other work;

j (3) Prevention of howling or whistling when the starting point

level of the loudspeaker is, for example, 100 dB

; to be able to communicate perfectly in a very noisy environment

! are sufficient;

! [K) . When the user speaks, the output level of the

; Speaker lowered and, in contrast, raised when listening

; while listening to the input level of the

; Ear microphone is lowered;

Andrejewski, Honke & Partner, patent attorneys in Essen

When communicating via a wireless transmission and reception system, the use of a conventional device such as a two-band transceiver may be possible while in use a wire system, a conventional wire transmitting and receiving device such as an intercom should be usable;

(6) When the user speaks and hears, both ears should not be completely closed in order to hear sounds from the surroundings to be able to perceive its safety, with an ear tip with the ear microphone and the loudspeaker in its one air duct should be used without completely closing it.

Requirements 1 to β above are met by a device according to the invention Intercom device of the type mentioned, which is characterized in that in the ear insert a vibration-absorbing organ with a loudspeaker is housed and that one of the electrical circuits the device has a tone control circuit which automatically controls the power level of the transmitted and received signals is switched on.

The tone control circuit or gain control circuit provided according to the invention is used to control the output level of the received signals and the input level of the transmitted signals to increase when the user is speaking and, in contrast, when listening to the user, to lower the transmission level and the Increase the reception level.

Andrejewski, Honice & Partner, patent attorneys in Essen

Further features and special features of the invention emerge from the following description of some exemplary embodiments based on the accompanying drawings; it shows

Fig. 1-3 block diagrams of various exemplary embodiments the invention;

4 is a perspective view in partial section of a Ear hook embodiment of the invention;

5 shows a perspective illustration of another exemplary embodiment the invention; and

6 shows a longitudinal section through an ear insert, as it is in the embodiment of Figure 5 is used.

Fig.l shows a basic circuit diagram of the invention as a first embodiment, which is applied to a wireless system for an intercom system, wherein output signals of the Ear microphone 1, which generates vibrations introduced through the bones into the external auditory canal as electrical signals receives, through the transmission circuit 5A of a radio device 5 via an amplifier 2, a band filter 35 and a variable Damping circuit 4 are broadcast.

On the other hand, input signals received by a receiving circuit 5B of a radio set 5 are changed by a variable Damping circuit 6 and a sound pressure loudspeaker 7, which is combined with the ear microphone 1, converted into audible tones .

Andrejewski, Honke & Partner, patent attorneys in Essen

In this transmitting and receiving system, the output and input signals are determined by a detector and the signals determined are then fed into a comparison circuit δ in order to control or correct the variable damping circuits 4 and 6. An automatic tone control circuit 9 according to the invention therefore consists of the aforementioned variable attenuation circuits 4 and 6 and the comparison circuit S _;

A preferred embodiment of the invention is shown in FIGS. Here are in the transmission system; Output signals of the ear microphone 1 from a preamplifier 2 | amplified and fed to the band filter 3, which passes signals in the j frequency band 5ΟΟ-3ΟΟΟ Hz, these signals then are input to an FM amplifier 10 of the wireless radio set 5 through the variable attenuation circuit 4 and can also be broadcast by air by the broadcast circuit 5A such as an FM transmitter.

On the other hand, in the receiving system of the receiving circuit 5B, the ? .B. from an RX. ANT filter as well as a high frequency and Low frequency amplifier consists, recorded signals amplified by an FM Det amplifier 11 and a variable Damping circuit 6 is input into an audio frequency amplifier 12 and also converted into audible tones. In this system, all transmitted and received signals are passed through detectors 13 and 14 determined and entered in the comparison circle δ, by which the variable attenuation circuits 4 and 6 are controlled in order to adjust the power level of the received signals high power level of the transmission signals to low values

Andrejewski, Honke & Partner, patent attorneys in Essen

correct when the user speaks and the power level correcting the transmitted signals to low values and at the same time correcting the power level of the received signals to high values, when the user stops speaking.

The intercom according to the invention or transmission and The receiving device can be designed as earrings or ear inserts or in a helmet or in a spectacle frame be accommodated.

An embodiment of an ear hanger according to the invention is shown in Pig. In this embodiment, the Ear microphone 1 inserted into an outer auditory canal of the user, this ear microphone 1 consisting of a housing with eir.-am sound passage 17 and a vibration absorbing Organ oaer sound sensor 16 such as a piezo element consists »The ear microphone 1 is with an ear hook 19 over a Sound! Onr IS connected, in which electrical lines 20 which transmit the output signals of the organ to electrical circuits housed in the ear hook 19 target.

Here; r ^ ei'.uet the reference number 21 an electrical power source, 22 a · = antenna, 23 a switch, while the other reference characters -i represent the same parts as in circuit diagram 2.

According to the invention, the ear insert can also be wireless System without the use of the sound tube and the electrical wiring according to Fig. 4 with a portable housing part

Andrejewski, Honice & Partner, patent attorneys in Essen

are connected, as is to be explained with reference to the exemplary embodiment according to FIGS.

In the transmission system of this exemplary embodiment, the output signals are of the ear microphone 1 is broadcast by a wireless transmitter T such as an FM ender in the ear insert part 19 and these transmission signals are received by a receiver R, which is accommodated in a portable housing part 5 is from which the user's speech is transmitted to another participant. The speech signals are in the receiving system of the other participant received by a receiving circuit 5B in the portable housing part 5 and via an inductive System which essentially consists of a loop antenna 24 attached to this housing 5 and one attached to the ear insert 19 Induction coil 25 is transmitted to the ear tip 19. These recorded speech signals are converted into audible tones by the sound printer 7 and then through the sound path 17 passed into the outer auditory canal of the wearer.

In addition to this design, it is possible to use the tone control circuit 9j described above with the portable Housing part 5 to be combined.

When using this training, there is a transmission and reception operation possible at high power levels and remote communication is also possible. It also becomes the user in his movements not disabled. Since there is no wire connection between the ear tip and the portable housing, effectively prevents the ear microphone from electrical interference

Andrejewslei, Honke & Partner, patent attorneys in Essen

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can accommodate, which are caused by such wire lines.

In summary, it should be noted that the above-described The invention meets the requirements 1 to 6 mentioned at the beginning in its training and punctures.

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Claims (2)

3115923 Andrejewski, Honke & Partner Patent Attorneys Physicist Dr. Walter Andrejewski Graduate engineer Dr.-Ing. Manfred Honke Physicist Dr. Karl Gerhard Masch Lawyer files: 4300 Essen 1, Theaterplatz 3, Postf. 10 02 D ¹ O 999 / Ti-th April 21, 19 & I Patent application Gen Engineering Inc. No.10-15 * Koyaraa 7-Chome, Shinagawa-Ku, Tokyo, Japan Intercom. Expectations. 1 / Counter-spreo device, consisting of an ear insert and a housing with electrical circuits arranged therein, characterized in that in the ear insert (19) a vibration-absorbing organ (l6) combined with a loudspeaker (7) is housed and that one of the electrical Electrical circuits of the facility one the power level of the Tone control circuit that automatically controls transmit and receive signals (9) is switched on. Andre | ewski, Honke & Partner, patent attorneys in Essen 2. Apparatus according to claim 1, characterized in that the ear insert and housings are connected by a pipe to form a unit (1, 19) and in this pipe an electrical connection line (20) between the vibration-absorbing organ (16) and the circuits of the housing and one of the loudspeaker (17) in the outer auditory canal leading sound path (17) run. J5. Device according to claim 1, characterized in that the Ear insert (19) is wirelessly connected to a housing part (5).