MXPA98007332A - Process and device to transmit are - Google Patents

Abstract

The objective is to improve a process and device for transmitting sound with the help of at least one sound transmission element which emits sound signals that can be perceived by a person, so that it is ensured that the signals of the sound can be transmitted. low frequency sound, as well as medium frequency and high frequency sound signals, very effectively in a technically simple and therefore inexpensive manner. For this purpose it is proposed that at least one sound transmission element must be placed in a certain way on the body of the listener so as to generate a direct transmission path of sound from the sound transmission element via the Eustachian tubes to the ossicles of the oi

Description

PROCESS AND DISPOSIT-IVO TO TRANSMIT SON-DO DESCRIPTION OF THE INVENTION The invention relates to a process for the transmission of sound by means of at least one means of sound transmission, which emits sound signals perceptible by a person. Such process serves, for example, in the transfer of music captured by a microphone or recorded on a recording medium. In this regard, the sound transmission means is a loudspeaker or also a hearing aid which emits sound signals in such a way that they are coupled to the human ear via the eardrum. By means of the loudspeakers which are placed in quarters or in the hearing aids, the eardrum vibrates in such a way that such acoustic signals, which, in turn, are processed by the internal auditory organ of the individual. Specifically, such incoming signals come from the ear canal and make contact with the eardrum which is put into vibratory movement which is transported over the bones of the hammer, anvil and stirrup of the middle ear, resulting in further processing by the ear. cochlea. The problem with this well-known auditory process is that the acoustic signals have a frequency a little lower than 700 Hertz (Hz). Since the human ear is Particularly sensitive to frequencies in the range between 700 and 6000 Hz, a sound in this range only needs a moderate intensity to be perceived. In contrast to this, a considerably higher volume is needed in order to perceive frequencies below 700 Hz. This characteristic of the human ear in itself provides a particular disadvantage with respect to the transmission of music, as in the case of the lower frequencies (that is, lower than 700 Hz) which are strongly suppressed. As a result of such suppression, the acoustic signals used to carry out the rhythm are pushed extremely into the background so that, as a result, the transmitted music is transmitted less vividly. In order to counteract this condition, various processes are known which make possible an effective increase of the sound pressure of the low frequency audio signals. A known method, for example, involves the general increase in the volume of audio waves transmitted from music. Therefore, the lower frequency signals are stronger, compared to the mid and high range signals, so the suppression curve becomes flatter as the sound pressure increases. However, what is harmful in this process is the fact that the medium and high-range audio signals show a higher wave pressure and consomitely a volume considerably higher than, in extreme cases, it is too high so that a person's pain threshold is reached or exceeded. This leads to an overload of the eardrum which, if this continues, can lead to ear damage. The other well-known procedure, the low frequencies, in contrast to the audio signals of medium and / or higher frequency, are specially amplified. This has the advantage that in the medium and high frequency ranges, the pain threshold is not reached. However, a disadvantage here is that such a procedure, in order to be successful, requires complex amplifiers having a variable amplification capacity (an amplification factor of about 1 to 10 million) which is exceptionally complex and, consequently, expensive and which, additionally, requires a considerable demand for energy. In addition, such systems require complex means of transmitting sound, for example, large speakers, which, due to their complexity and large size, can only be transported with considerable effort. EP 0 553 525 A1 discloses a device for transmitting sound wherein the sound transmission medium is placed in the abdominal or dorsal region of a person. Especially when the medium is located in the abdominal region, but also when it is located in the dorsal region, a relatively high degree of sound damping occurs over short distances, and - the skin, tissue and other parts of the body Subjacent to the medium of sound transmission have extremely good damping characteristics. US 4 641 345 describes a device for the transmission of sound wherein the sound transmission means colossus on the back of a vehicle seat. The transmission of sound to the body is damped considerably in this case as well. The damping effect is produced in this case not only by the skin, tissue and other parts of the body, but also by the damping characteristics of the driver's seat. Accordingly, the object of the invention is to improve an audio signal transmission process of the described category, so that, along with the medium and high frequency audio waves, the audio waves of the audio are also transmitted economically. low frequency and, technically speaking, it is easy and, consequently, with extreme efficiency and, above all, without losses due to damping. In a process for the transmission of sound as described above, the proposed objective is achieved in accordance with the invention by the fact that, in order to transmit the low frequency sound signals, in particular, the transmission medium Sound is placed in the chest region, in the vicinity of the sternum, of a person, so that the direct transmission path is obtained from the middle of transmission of sound via the eustachian tube to the bones of the person's middle ear. The transmission, in particular, of low frequency audio waves by means of sound transmission singled out in the vicinity of a person's sternum via the eustachian tube to the bones of the middle ear provides, on the one hand, the particular advantage that the eardrum and, therefore, the cushion effect of the eardrum is eliminated. Accordingly, there is no need for compensation of the damping effect, for example, by a variable audio amplification or the like, in order to achieve low frequency audio transmission in a manner suitably adapted to the human ear. On the other hand, it is an advantage that when collating the means of transmission of sound in the vicinity of the sternum, the vibrations are transmitted to the whole of the chest cavity, the sternum is connected to the ribs and, by means of the latter, with the pleura. In turn, the thorax cavity lodges air in the lobes of the lungs in vibration. From here, the vibrations will. Clothes are sent via the pharyngeal tube to the eustachian tube and from here to the bones of the middle ear. It is an advantage of this arrangement that the entire thoracic cavity is used as a resonator that forms a kind of bandpass filter similar to the well-known subwoofer. In this way, one gets a transmission particularly advantageous, especially low-frequency audio signals, without going through the eardrum. The process can be carried out is a simple technical means and requires only a relatively low amount of energy. Accordingly, it can also be carried out in a mobile device. In order to transmit the entire frequency spectrum of audio waves mentioned previously, and especially a usable embodiment of the process, it is provided that the audio signals are transmitted auditorily by means of another means of transmitting sound, for example, a loudspeaker or a hearing aid, which may be possible the coupling of the acoustic signals to the eardrum of the person. In this way, the medium frequency and / or higher frequency waves, in particular, can be transmitted in a conventional manner to the eardrum while at the same time, independently of this, the low frequency waves are additionally transmitted in a special manner. effective by means of a sound transmission medium, which, for example, can be placed in the area of a person's sternum. The sound transmission means can be a loudspeaker or a resonator or the like, all known as such. A stable objective is also obtained according to the invention by a device for the transmission of sound with at least one means of sound transmission, in which at least one means of transmitting sound is placed in the region of the thorax of a person in the vicinity of the sternum, so that a direct transmission path of sound is obtained from the sound transmission medium via the eustachian tube to the bones of the middle ear of the person. In particular, with respect to the selection of audio signals that are transmitted via the sound transmission means thus collated in the vicinity of a person's sternum, it is particularly disadvantageous that at least one means of sound transmission is preceded by at least one distribution device for the distribution of sound signals. Mainly speaking, the most varied configurations of distribution devices can be used; advantageously, at least one distribution device includes at least one frequency filter device. With respect to the frequency filter means, the most varied sonfigurations are sonicable; Advantageously, the frequency filter is of low pass which, technically speaking, is easy to manufacture. However, it is also possible for the frequency filter device to involve a frequency switch and a low pass, as well as a high pass - so that medium frequency and high frequency waves can be transmitted to through the high pass via an additional transmission medium which emits sound coupled to the person's eardrum. The sound transfer devices which can be considered here involve the most varied implementations. Technically, simple implementations would be loudspeakers and / or resonators. Further details and advantages of the invention are explained in greater detail in the following description with reference to the drawings. In the drawings are shown: In figure 1 is a schematic flow chart of the inventive process for sound transmission; Figure 2 is a device of the invention for sound transmission. The invention regarding the transmission of sound is best described on the basis of Figure 1. As can be seen in Figure 1, the sound signals are transported from a source (40) of sound to a medium (50) of distribution. In principle, a multiplicity of respective apparatuses can be considered as a means (50) of distribution. For example, a frequency filter means or a frequency switch which, moreover, can for example be carried out by means of a low pass (20) and high pass filter (30). The sound signals of higher frequencies in this way are transferred by means of the eardrum (60) to the inner ear (80), while the signals of Lesser fresuensia sound is transmitted on the sternum (70) to the inner ear (80). The transfer is carried out, for example, via the loudspeakers (27), (37) whereby the loudspeakers (27) subsequently switched and coupled with the low pass filter are placed in the vicinity of the sternum (70), while that the loudspeaker attached to the high pass filter (37) is presented exemplary in the form of a hearing aid. It does not have to be said that the lower-frequency sound signals can be transmitted further via the loudspeaker (37). An example of such an installation for the transmission of sound, which is provided in Figure 2, includes a sound captor or transmission device (10), for example a tape recorder or a microphone with an activated amplifier, which transmits signals on a signal line (11) to the frequency filter means in the form of a low pass filter (20) and a high pass filter (30). Uniquely the smaller fresuensia sound signals pass through the low pass filter (20), where the low filter pass (20) is built so that only sound signals below 700 Hz can pass through it. , while at the same time, sound signals of medium and higher frequency, higher than 700 Hz of the sound signals are eliminated by filtering the low pass filter (20).

Contrastingly, only medium and / or high frequency sound signals higher than 700 Hz pass through the high pass filter (30) while the sound signals below 700 Hz are eliminated by filtering the sound signals of the high pass filter (30). With respect to the low pass filter (20) as well as the high pass filter (39), the appropriately engineered amplifiers (25), (35) can be subsequently activated, respectively, at their assigned frequency ranges - the which, in turn, are transmitted by the amplifiers to the speakers (27), (37). As mentioned above, the loudspeaker (27) is placed in the vicinity of the sternum (70) of a person so that a direct transmission path of sound is obtained from the loudspeaker (27) over the chest cavity, to the tubes of Eustachian and from there to the bones of the middle ear. The chest cavity of the person functions, in this way, as an additional resonant body similar to that used for the transmission of low frequency sound signals in audio technique - a subwoofer. The loudspeaker (37) can be, for example, a familiar loudspeaker, or as already mentioned above, a hearing aid or any similar device which can make possible the coupling of sound by means of a person's eardrum (69).

Via this technical apparatus, the medium and higher frequency sound signals are transmitted in a well-known way by using a person's eardrum (69) while the lower frequency sound signals are transferred. essentially on the thorax cavity and Eustachian tubes to the bones of a person's middle ear (80). As a result, a particularly realistic transmission of sound is obtained, in partisular of the music. Such a technical apparatus can be carried out on the basis of a simple technical means. Such a system is light, sompact and portable and, consequently, can be used anywhere, and at any time. This is particularly true in the case of portable devices similar to cassette recorders or CD players. In addition, such a system requires very little energy and can even be activated by battery, therefore, such a system would be independent of external energy sources. Finally, such a system, based on the preceding argument, is also particularly economical to manufacture, and consequently, it is also of good value to the consumer.

Claims (11)

REIvTNDICATIONS

1. A process for the transmission of sound by means of at least one sound transmission medium, which emits sound signals perceptible by a person, wherein at least one means of sound transmission is placed in the body of a person , the process is characterized in that the means of sound transmission colossus in the thorax region, in the vicinity of the sternum of the person so that a direct transmission path of sound is obtained from the sound transmission medium, via the Eustachian tube to the bones of the person's middle ear.

2. The process according to claim 1, characterized in that the additional transmission of the sound signals via the means of additional sound transmission, which makes it possible to join the sound signals to the eardrum of a person.

3. The compliance process is claim 1 or 2, characterized in that the means of sound transmission are loudspeakers.

4. The process according to claim 1 or 2, characterized in that the means of transmitting sound are resonators.

5. A device for the transmission of sound by means of at least one sound transmission means, characterized in that at least one means of sound transmission is placed in the region of the thorax, in the vicinity of the sternum, of a person so that a direct transmission path of sound is obtained from the sound transmission medium via the eustachian tube to the bones of the person's middle ear.

6. The device according to claim 5, characterized in that at least one sound transmission means is preceded by at least one distribution means.

7. The device according to claim 5 or 6, characterized in that at least one distribution means includes at least one frequency filter means.

8. The compliance device is claim 7, characterized in that at least one frequency filter means is a low pass filter.

9. The sonicity device is claim 7, characterized in that at least one frequency filter means includes a low pass filter, as well as a high pass filter and medium and / or high frequency sound signals pass through the high pass filter and are transported via an additional transmission medium sound in association with a person's eardrum.

10. The device according to one of claims 5 to 9, characterized in that the sound transmission means are loudspeakers.

11. The device according to one of claims 5 to 9, characterized in that the sound transmission means are resonators.