KR19990087652A - Device and process for transmitting sound - Google Patents

Abstract

With the aid of one or more sound-transmission elements that send sound signals that can be perceived by humans, improving the process and device of transmitting sound is essential. It is an object of the present invention, so that in a technically simple and therefore inexpensive manner, it is very effective not only to lower the mid-frequency sound signal and the higher-frequency sound signal, but also to lower it. Make sure to transmit frequency acoustic signals. To this end, one or more sound transmission elements (eg, to the listener's body) are created to create a direct sound-transmission path from the sound transmission element through the Eustachian tube to the auditory ossicle. It is suggested to install a sound-transmission element.

Description

Device and process for transmitting sound

For example, in the transmission of music obtained by a microphone or recorded on a recording medium, the above process is used. In this regard, the sound transmitting means is a loudspeaker, a headphone or the like which sends a sound signal in such a manner as to be connected to the listener through the eardrum. Through a loudspeaker installed in a room or a headphone or the like, the acoustic signal processed in turn by the individual internal auditory organs vibrates the eardrum. Specifically, the incoming signal enters the auditory passageway, the incoming signal contacts the eardrum, the eardrum is set to vibration motion, and the vibrating motion is in the middle ear's hammer and anvil. ) And stirrup bone and the like, and are further processed by the cochlea.

An uncertainty in the known auditory process is an acoustic signal having a frequency of about 700 Hz or less. Since human hearing is particularly sensitive to frequencies between 700 Hz and 6000 Hz, the sound in this range only needs to have a reasonable intensity that can be perceived. In comparison with the above, in order to perceive frequencies lower than 700 kHz, a quite high volume is required. As in the case of reliably suppressing lower frequencies (lower than 700 kHz), the characteristics of human hearing in terms of transmitting music have their own particular disadvantages.

As a result of the suppression, the acoustic signal used to perform the rhythm is pushed backwards so that the transmitted music is less live. For the purpose of reversing this situation, various procedures are known which can enable an effective increase in the sound pressure of an audible low-frequency audio signal.

One known procedure, for example, involves a general increase in volume in the transmitted audio frequency wave of music. As a result, the suppression curve becomes flatter while increasing the sound pressure, so that the low-frequency signal becomes larger, in combination with the middle range signal, the higher range signal and the like.

However, the disadvantage of this process is that in mid-range audio frequency signals and high-range audio frequency signals, etc., higher wave pressures appear, and at the same time considerably more high enough to reach or exceed human limit pain in extreme cases. High volume appears. This leads to overwork of the eardrum and eventually hearing damage.

In another known procedure, the lower frequency is specifically amplified in comparison to the intermediate frequency signal and the higher frequency signal, or any one frequency band. In the middle frequency range, higher frequency range, etc., there is an advantage of not reaching the limit pain. However, a disadvantage here is that even if successful, the procedure requires a complex amplifier with varying amplification capacity (amplification factor of about 1 to 10,000,000), which is particularly complex and therefore expensive and additionally It requires a lot of energy. In addition, the system requires complex sound transmitting means, for example large loudspeakers, which can be carried with great effort because of their complexity and large size. have.

EP 0 553 525 A1 discloses a device for transmitting sound, wherein the sound transmitting means is a human abdominal region or a dorsal region. It is installed on the back. In particular, when the means are located not only in the abdomen but also in the dorsal part, a relatively high degree of sound absorption has short distances, skin, textiles, and extremely good absorption characteristics. It already occurs in other parts of the body, such as under sound transmitting means.

US 4 641 345 describes a device for transmitting sound, wherein sound transmitting means is installed at the rear of the vehicle seat. In this case, the transmission of sound to the body is considerably absorbed. In this case, the absorbing characteristics of the driver's seat, as well as the skin, the fabric and other parts of the body, create a dampening effect.

The present invention relates to a process for transmitting sound by one or more sound transmitting means, wherein the present invention transmits a sound signal that can be perceived by a person.

1 diagrammatically shows a flow chart of a process for transmitting sound in accordance with the present invention;

2 shows an apparatus for transmitting sound according to the invention.

* Code Description

10 ... sound pickup device

Sound transmission device

11 ... signal line 20 ... low pass

30 ... high pass 25, 35 ... amplifier

27, 37 ... loudspeaker 40 ... sound source

50 ... distribution means

60 ... eardrum 70 ... breastbone

80 ... inner ear

Accordingly, it is an object of the present invention to improve the process of audio signal transmission in the described range, thereby making it possible to follow the audible low frequency wave, the higher audible frequency wave, and the like. Low-frequency audio waves can be transmitted economically and, if technically speaking, can be easily and consequently transmitted as extreme effects and, above all, without dampening losses.

As described from the outset, in the process of transmitting sound, in order to transmit low frequency sound signals, in particular in the chest region of a person, the means for transmitting the breastbone of a person The present invention is based on the fact that the direct transmission path from the acoustic transmission means to the middle ear bone of the human middle ear is obtained through the Eustachian tube. In accordance with this, the claimed object is achieved.

The special transmission of an audible low-frequency wave by means of an acoustic transmission means located near the human sternum through the Eustachian tube, bypasses the absorption effect of the tympanum and, therefore, the tympanic membrane. Supply advantage. Therefore, for the purpose of achieving the transmission of an audible low frequency signal in a manner suitably applied to human hearing, for example, to compensate for the absorption effect (compensation), such as by amplifying various audible frequencies. There is no need for it.

In the other direction, by installing sound transmission means in the vicinity of the sternum, vibrations are transmitted to the entire chest cavity, where the breastbone is connected to the ribs and through the ribs (pleura). The chest cavity then sets the air into vibrations in the lungs of the lungs. Vibration propagates from the lobe to the eustachian tube through the pharyngeal tube, and from the eustachian tube to the bones of the middle ear. The advantage of the installation is that the entire chest cavity is used as a resonator to form a band-pass filter similar to a known sub-woofer sub-woofer. I). Thereby, the advantage of specially transmitting an audible low frequency signal while bypassing the eardrum is obtained.

Process can be realized by simple technical means and requires only relatively low energy. Therefore, the process may be effective in a mobile device.

For the purpose of transmitting the entire frequency spectrum of the audible frequency waves described above, an audible signal is provided via another sound transmission means, such as a loudspeaker of a headphone, which makes it possible to connect an acoustic signal to the human eardrum. A particularly advantageous embodiment of the process provides for the further transmission of the frequency signal.

In particular, intermediate and higher frequency waves, or any one of the waves, may be transmitted in a conventional manner to the eardrum, but at the same time independent of it, for example acoustic transmission means that can be placed in the human sternum area ( Sound transmission means can further transmit lower frequency waves in a particularly effective manner.

Sound transmission means can all be known loudspeakers, or resonators and similar devices.

A claimed object is also achieved in accordance with the invention by an apparatus for transmitting sound with one or more sound transmission means, wherein the one or more sound transmission means is in the chest region of the person, in the sternum. By being installed near, the direct transmission path from the sound transmission means to the middle ear bone of the human middle can be obtained through the Eustachian tube.

In the selection of an audible frequency signal, which is transmitted in particular through the sound transmission means laid in this manner in the vicinity of the human sternum, the one or more distribution devices for distributing the sound signal may comprise one or more sound transmission means. The following is a special advantage.

In principle, most of the various structures of a distribution device can be used; It is advantageous for one or more distributed devices to include one or more frequency filter devices.

With regard to frequency filter means, most of the various structures are conceivable; Technically speaking, a frequency filter is a low pass that can be easily implemented.

However, the frequency filter device also includes a frequency switch, a low pass as well as a high pass-and an intermediate frequency wave passing through the high pass through another transmission means for sending a signal connected to the human eardrum. Transmits high-frequency waves, etc.

Sound transfer devices that may be considered herein include most of the various implementations. A technically simple implementation can be a loudspeaker and a resonator, or either.

Further details, advantages, and the like of the present invention are explained in more detail in the following description with reference to the drawings.

The present invention relating to sound transmission is described based on FIG. 1. As can be seen in FIG. 1, a sound signal is transmitted from a sound source 40 to a dispersion bution means 50. In principle, a number of devices can be considered with regard to use as the distributing means 50. For example, frequency filter means or frequency switches can be considered, and furthermore, these devices can, for example, be low pass 20 and high pass 30, for example. Can be realized. Thereby a higher-frequency sound signal is transmitted through the eardrum 60 to the inner ear 80, while the lower-frequency sound signal is transmitted to the sternum 70 It is transmitted to the inner ear 80 through a breastbone. For example, transmission is effected through loudspeakers 27 and 37, where a loudspeaker, which is coupled with a low pass, resulting in a switch, is installed near the sternum 70, while ( The loudspeaker 37 coupled with the high pass as an example to the rear is presented in the form of a headphone. Lower frequency acoustic signals may further be transmitted through loudspeaker 37.

The example given in FIG. 2 of the installation for sound transmission is in the form of a low pass 20, in the form of a high pass 30 in a frequency filter means. Sound pickup device 10, such as a tape recorder or microphone with an activated amplifier for transmitting signals over a signal line 11, for example. Or a sound transmission device 10.

Only the lower frequency acoustic signal passes through the low pass 20 and configures the low pass 20 so that only acoustic signals lower than 700 kHz can pass through the low pass 20, while At the same time, mid-frequency sound signals, higher-frequency sound signals, and the like, which are above 700 kHz, are filtered unlike the low pass 20.

In comparison, a mid-frequency sound signal and a higher-frequency sound signal, or one of the frequencies above 700 Hz, pass through the high pass 30, On the other hand, an acoustic signal lower than 700 Hz is filtered unlike the acoustic signal of the high pass 30.

With respect to the high pass 30 as well as the low pass 20 and the like, suitably tuned amplifiers 25 and 35 (amplifiers) can be operated as a result for their assigned frequency ranges-the frequency then being fed to the amplifier. By the loudspeakers 27, 37 and the like.

As described above, the loudspeaker 27 is installed in the vicinity of the human sternum 70, whereby the loudspeaker 27 passes through a chest cavity into an Eustachian tube and then the middle ear. Obtain a direct sound transmission path to the middle ear bone. As a result, the chest cavity of a person has an additional resonating body--sub, similar to the body used for the transmission of low-frequency acoustic signals in an audible frequency technique. -Acts as a sub-woofer.

For example, the loudspeaker 37 may be a familiar loudspeaker, or may enable an acoustic connection through headphones or a human eardrum 60 as already described above. It can be something similar.

Through the technical device, the mid-frequency sound signal, the higher-frequency sound signal, and the like are transmitted in a known manner by the use of the human eardrum 60. On the other hand, lower frequency acoustic signals are transmitted substantially through the chest cavity and the Eustachian tube to the middle ear bones 80 of the human middle ear. Can be. As a result, the transmission of sound is particularly realistically achieved, in particular the transmission of music.

The technical device can be realized on the basis of simple technical means. The system is light, compact, portable and therefore available anytime anywhere. Especially in the case of a portable device, it may be a cassette recorder or a CD-player. In addition, the system requires very little energy and can even be driven by a cell, where the system is independent of external energy-sources. Finally, based on the above results, the system is also economical to manufacture and therefore also affordable to the user.

Claims (11)

Sound is transmitted by one or more sound transmitting means (27, 37) which transmit a sound signal that can be perceived by a person, the one or more sound transmitting means (27) In the process of being located in the body of The sound transmission means 27 is installed in the chest region of the human being and near the breastbone of the human breast 70 so that the Eustachian tube is transferred from the sound transmission means 27. A process of transmitting sound, characterized in that it completes a direct sound transmission path to the middle ear bone of a human through. The transmission of sound as claimed in claim 1, characterized in that the sound signal is further transmitted via an additional sound transmission means (37) which makes it possible to connect the sound signal to the eardrum (eardrum) of the person. Process. A process as claimed in claim 1 or 2, characterized in that the sound transmitting means (27, 37) and the like are loudspeakers. A process as claimed in claim 1 or 2, characterized in that the sound transmitting means (27, 37) or the like is a resonator. In a device for transmitting sound by one or more sound transmitting means (27, 37), One or more sound transmission means 27 are installed in the chest region of the person and in the vicinity of the breastbone of the person 70 so that the Eustachian tube in the sound transmission means 27. A device for transmitting sound, characterized in that it completes a direct sound transmission path to the middle ear bone of the human middle ear). 6. A device as claimed in claim 5, characterized in that the one or more distribution means follows the one or more sound transmission means (27, 37) and the like. 7. A device as claimed in claim 5 or 6, characterized in that the at least one distributing means (50) is at least one frequency filter means. 8. Device according to claim 7, characterized in that the at least one frequency filter means is a low pass (20). 8. Acoustic transmission means (37) according to claim 7, wherein the one or more frequency filter means comprise a low pass as well as a high pass (30) and the like, which are added in connection with the human eardrum. A device for transmitting sound, characterized in that it transmits a mid-frequency sound signal and a higher-frequency sound signal passing through the high pass. . 10. Device according to one of the claims 5 to 9, characterized in that the sound transmitting means (27, 37) or the like is a loudspeaker. 10. A device according to one of claims 5 to 9, characterized in that the sound transmitting means (27, 37) or the like is a resonator.