CA2248019A1 - Process and device for transmitting sound - Google Patents
Process and device for transmitting sound Download PDFInfo
- Publication number
- CA2248019A1 CA2248019A1 CA002248019A CA2248019A CA2248019A1 CA 2248019 A1 CA2248019 A1 CA 2248019A1 CA 002248019 A CA002248019 A CA 002248019A CA 2248019 A CA2248019 A CA 2248019A CA 2248019 A1 CA2248019 A1 CA 2248019A1
- Authority
- CA
- Canada
- Prior art keywords
- sound
- transmission means
- sound transmission
- person
- frequency
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R5/00—Stereophonic arrangements
- H04R5/02—Spatial or constructional arrangements of loudspeakers
- H04R5/023—Spatial or constructional arrangements of loudspeakers in a chair, pillow
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/02—Casings; Cabinets ; Supports therefor; Mountings therein
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
- H04R3/12—Circuits for transducers, loudspeakers or microphones for distributing signals to two or more loudspeakers
Abstract
The aim is to improve a process and device for transmitting sound with the aid of at least one sound-transmission element which emits sound signals that can be perceived by a person, so as to ensure that low-frequency sound signals, as well as medium- and higher-frequency sound signals, can be transmitted very effectively in a technically simple and therefore inexpensive manner. To that end it is proposed that at least one sound-transmission element should be so arranged on the listener's body as to create a direct sound-transmission pathway from the sound transmission element via the Eustachian tubes to the auditory ossicles.
Description
Process and device for the transmission of sound.
The invention concerns a process for the transmission of sound by meansof at least one sound transmission means, which emits sound signals perceivable by a person.
Such processes serve, for instance, in the transfer of music picked up by a microphone or recorded on a recording medium. In this connection, the sound transmission means is a loudspeaker or also a head phone which emits sound signals in such a manner that they are coupled to human hearing via the eardrum. Via loudspeakers which are placed in rooms or in headphones, the eardrum is vibrated by such acoustic signals which are, in turn, processed by the internal hearing organ of the individual. In specific, such incoming signals enter the hearing passage and make contact with the eardrum which is set into vibrating motion which is carried over to the hammer, anvil and stirrup bones of the middle ear resulting in further processing by the cochlea.
Problematic to this well-known auditory process are acoustic signals which have a frequency somewhat under 700 Hertz (Hz). As human hearing is particularly sensitive to frequencies in the range between 700 and 6,000 Hz, a sound in this range need only have a moderate intensity to be perceived. In contrast to this, considerably higher volume is needed in order that frequencies lower than 700 Hz are perceived. This characteristic of human hearing proves itself to be a particular disadvantage regarding the transmission of music, as in such a case lower frequencies (i.e., under 700 Hz) are strongly suppressed.
As a result of such suppression the acoustic signals used to perform rhythm are extremely pushed into the background so that, as a result, transmitted music is less lively. In order to counteract this condition various processes are known which can make possible an effective increase of the sound pressure of low-frequency audio signals.
One known procedure, for example, involves the general increase in volume of transmitted audio waves of music. Hereby, lower frequency signals are, in comparison to mid- and higher-range signals, louder, as the suppression curve becomes flatter with increasing sound pressure.
Detrimental in this process, however, is the fact that mid- and high-range audio signals manifest a higher wave pressure and concomitantly a considerably higher volume that, in extreme cases, is so high that the pain threshold of a person is reached or exceeded. This leads to an overburdening of the eardrum which, in the long run, can lead to hearing damage .
In another well-known procedure lower frequencies, as contrasted to mid-and/or higher-frequency audio signals, are especially amplified. This has the advantage that in the mid- and higher-frequency ranges, the pain ~ CA 02248019 1998-09-02 threshold is not reached. A disadvantage here, however, is that such a procedure, to be successful, requires complex amplifiers having a variable amplification capacity (an amplification factor of about 1 to 10 million ) which are exceptionally complex and, accordingly, costly and which, additionally, require a considerable energy demand. Furthermore, such systems require complex sound transmission means, for example large loudspeakers, which due to their complexity and large size can be transported only with considerable effort.
EP 0 553 525 A1 discloses a device for the transmission of sound where sound transmission means are arranged in the abdominal or in the dorsal region of a person. Especially when the means are located in the abdominal region, but also when they are located in the dorsal region, a relatively high degree of dampening of the sound occurs already over short distances, the skin, tissue and other parts of the body underlying the sound transmission means having extremely good dampening characteristics .
US 4 641 345 describes a device for the transmission of sound where the sound transmission means is arranged at the back of a vehicle seat. The transmission of sound to the body is dampened considerably is this case as well. The dampening effect is produced in this case not only by the skin, tissue and other parts of the body, but in addition also by the dampening characteristics of the driver's seat.
Accordingly, the object of the invention is to improve a process of audio signal transmission of the described category so that along with mid- and higher-frequency audio waves, low-frequency audio waves can also be transmitted economically and, technically speaking, easily and, consequently, with extreme efficiency and, above all, without dampening losses.
In a process for transmission of sound as described at the outset, the stated object is achieved according to the invention by the fact that for transmitting low-frequency sound signals, in particular, the sound transmission means is positioned in the chest region, in the vicinity of the breastbone, of the person so that a direct transmission path is obtained from the sound transmission means via the Eustachian tube to the bones of the middle ear of the person.
The transmission especially of low-frequency audio waves by sound transmission means positioned in the vicinity of the breastbone of a person via the Eustachian tube to the bones of the middle ear provides on the one hand the particular advantage that the eardrum and, thus, the dampening effect of the eardrum are bypassed. Accordingly, there is no need for compensation of the dampening effect, for example by variable audio amplification of the like, in order to achieve transmission of low-frequency audio signals in a way properly adapted to human hearing.
On the other hand, it is an advantage that by arranging the sound transmission means in the vicinity of the breastbone the vibrations are transmitted to the entire chest cavity, the breastbone being connected with the ribs and, via the latter, with the pleura. The chest cavity in its turn setsthe air in the lobes of the lung into vibration. From there, the vibrations propagate via the pharyngeal tube to the Eustachian tube and from there to the bones of the middle ear. It is the advantage of this arrangement that the entire chest cavity is used as a resonator forming sort of a band pass filter similar to the well-known subwoofer. One thereby obtains a particularly advantageous transmission, especially of low-frequency audio signals, while bypassing the eardrum.
The process can be realized with simple technical means and requires only a relatively low amount of energy. It can, accordingly, also be effected in a mobile device.
In order to transmit the entire frequency spectrum of audio waves previously mentioned, an especially profitable embodiment of the process provides that the audio signals are additionally transmitted via another sound transmission means, for example a loudspeaker of a headphone, which would make possible the coupling of acoustic signals to the eardrum of the person.
In such a manner mid- and/or higher-frequency waves, in particular, could be transmitted in a conventional manner to the eardrum while at the same time, independent to this, lower-frequency waves will be additionally transmitted in an especially effective way via sound transmission means which for example could be placed in the area of the breastbone of a person.
The sound transmission means could be a loudspeaker or a resonator or the like, all known as such.
The stated object is also achieved according to the invention by a device for the transmission of sound with at least one sound transmission means, in which the at least one sound transmission means is positioned in the chest region of a person in the vicinity of the breastbone, so that a direct -sound transmission path from the sound transmission means via the Eustachian tube to the bones of the middle ear of the person is obtained.
In particular, regarding the selection of audio signals that are transmitted via sound transmission means placed in this way in the vicinity of the breastbone of a person, it is particularly advantageous that the at least one sound transmission means is preceded by at least one distribution device for the distribution of the sound signals.
Principally speaking, the most varied configurations of distribution devices could be used; advantageously the at least one distribution device includes at least one frequency filter device.
With regard to the frequency filter means, the most varied configurations are conceivable; advantageously the frequency filter is a low pass which, technically speaking, would be easy to realize.
Also possible, however, would be that the frequency filter device involve a frequency switch and a low pass, as well as a high pass - whereby mid-and high-frequency waves passing through the high pass would be transmitted via a further transmission means which emits sound coupled to the eardrum of the person.
Sound transfer devices which could 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:
Fig. 1: a schematic flowchart of the inventive process for transmission of sound;
Fig. 2: an inventive device for transmission of sound.
The invention concerning the transmission of sound is best described on the basis of fig. 1. As can be seen in fig. 1, sound signals are conveyed from a sound source (40) to a distribution means (50). In principle, a multiplicity of apparatuses could be considered respective to the use as distribution means (50). For example a frequency filter means or a frequency switch which, further, could for example be realized via a low pass (20) and a high pass (30). Higher-frequency sound signals would thereby be transferred via the eardrum (60) to the inner ear (80) whereas lower-frequency sound signals would be transmitted over the breastbone (70) to the inner ear (80). The transfer is effected for instance via loudspeakers (27), (37) whereby the subsequently switched loudspeakers (27) coupled with the low pass is positioned in the vicinity of the breastbone (70), while the loudspeaker linked to the high pass (37) is exemplarily presented in the form of a headphone. It goes without saying that the lower-frequency sound signals can be additionally transmitted via the loudspeaker (37).
An example of such a setup for the transmission of sound, which is given in figure 2, includes a sound pickup or transmission device (10), for example a tape recorder or a microphone with an activated amplifier, which transmits signals over a signal line (11) to the frequency filter means in the form a low-pass (20) and high-pass (30).
Only lower-frequency sound signals pass through the low-pass (20), where the low-pass (20) is so constructed that only sound signals lower than 700 Hz can pass through it, while at the same time mid- and higher-frequency sound signals above 700 Hz of the sound signals are filtered out of the low-pass (20).
Contrastingly, only mid- and/or higher-frequency sound signals above 700 Hz pass through the high-pass (30) while sound signals under 700 Hz are filtered out of the sound signals of the high-pass (30).
Regarding the low-pass (20) as well as the high-pass (39), appropriately engineered amplifiers (25), (35) can be subsequently activated respective to their assigned frequency ranges - such frequencies of which are, in turn, transmitted by the amplifiers to the loudspeakers (27), (37).
As mentioned above, the loudspeaker (27) is arranged in the vicinity of the breastbone (70) of a person so that a direct sound transmission path from the loudspeaker (27) over the chest cavity, to the Eustachian tubes, and then to the bones of the middle ear results. The chest cavity of the person functions, hereby, as an additional resonating body similar to that used for the transmission of low-frequency sound signals in audiotechnics -- a subwoofer.
The loudspeaker (37) can, for example, be the familiar loudspeaker, or as has already been mentioned above, a headphone or anything similar which can make possible the coupling of sound via the eardrum of a person (69).
Via this is technical apparatus, mid- and higher-frequency sound signals are transmitted in an already well-known manner by utilization of the eardrum of a person (69) while lower-frequency sound signals are essentially transferred over the chest cavity and the Eustachian tubes to the bones of the middle ear of a person (80). As a result, one achieves a particularly realistic transmission of sound, in particular that of music.
Such a technical apparatus can be realized on the basis of simple technical means. Such a system is light, compact and portable and is, accordingly, useable everywhere, anytime. Particularly so in the case of portable devices similar to cassette recorders or CD-players. Further, such a system requires very little energy and can be even driven by battery, whereby, such a system would be independent of external energy sources. Finally, such a system, on the basis of the preceding argumentation, is also particularly economical to manufacture and is, accordingly, also a good value for the customer.
The invention concerns a process for the transmission of sound by meansof at least one sound transmission means, which emits sound signals perceivable by a person.
Such processes serve, for instance, in the transfer of music picked up by a microphone or recorded on a recording medium. In this connection, the sound transmission means is a loudspeaker or also a head phone which emits sound signals in such a manner that they are coupled to human hearing via the eardrum. Via loudspeakers which are placed in rooms or in headphones, the eardrum is vibrated by such acoustic signals which are, in turn, processed by the internal hearing organ of the individual. In specific, such incoming signals enter the hearing passage and make contact with the eardrum which is set into vibrating motion which is carried over to the hammer, anvil and stirrup bones of the middle ear resulting in further processing by the cochlea.
Problematic to this well-known auditory process are acoustic signals which have a frequency somewhat under 700 Hertz (Hz). As human hearing is particularly sensitive to frequencies in the range between 700 and 6,000 Hz, a sound in this range need only have a moderate intensity to be perceived. In contrast to this, considerably higher volume is needed in order that frequencies lower than 700 Hz are perceived. This characteristic of human hearing proves itself to be a particular disadvantage regarding the transmission of music, as in such a case lower frequencies (i.e., under 700 Hz) are strongly suppressed.
As a result of such suppression the acoustic signals used to perform rhythm are extremely pushed into the background so that, as a result, transmitted music is less lively. In order to counteract this condition various processes are known which can make possible an effective increase of the sound pressure of low-frequency audio signals.
One known procedure, for example, involves the general increase in volume of transmitted audio waves of music. Hereby, lower frequency signals are, in comparison to mid- and higher-range signals, louder, as the suppression curve becomes flatter with increasing sound pressure.
Detrimental in this process, however, is the fact that mid- and high-range audio signals manifest a higher wave pressure and concomitantly a considerably higher volume that, in extreme cases, is so high that the pain threshold of a person is reached or exceeded. This leads to an overburdening of the eardrum which, in the long run, can lead to hearing damage .
In another well-known procedure lower frequencies, as contrasted to mid-and/or higher-frequency audio signals, are especially amplified. This has the advantage that in the mid- and higher-frequency ranges, the pain ~ CA 02248019 1998-09-02 threshold is not reached. A disadvantage here, however, is that such a procedure, to be successful, requires complex amplifiers having a variable amplification capacity (an amplification factor of about 1 to 10 million ) which are exceptionally complex and, accordingly, costly and which, additionally, require a considerable energy demand. Furthermore, such systems require complex sound transmission means, for example large loudspeakers, which due to their complexity and large size can be transported only with considerable effort.
EP 0 553 525 A1 discloses a device for the transmission of sound where sound transmission means are arranged in the abdominal or in the dorsal region of a person. Especially when the means are located in the abdominal region, but also when they are located in the dorsal region, a relatively high degree of dampening of the sound occurs already over short distances, the skin, tissue and other parts of the body underlying the sound transmission means having extremely good dampening characteristics .
US 4 641 345 describes a device for the transmission of sound where the sound transmission means is arranged at the back of a vehicle seat. The transmission of sound to the body is dampened considerably is this case as well. The dampening effect is produced in this case not only by the skin, tissue and other parts of the body, but in addition also by the dampening characteristics of the driver's seat.
Accordingly, the object of the invention is to improve a process of audio signal transmission of the described category so that along with mid- and higher-frequency audio waves, low-frequency audio waves can also be transmitted economically and, technically speaking, easily and, consequently, with extreme efficiency and, above all, without dampening losses.
In a process for transmission of sound as described at the outset, the stated object is achieved according to the invention by the fact that for transmitting low-frequency sound signals, in particular, the sound transmission means is positioned in the chest region, in the vicinity of the breastbone, of the person so that a direct transmission path is obtained from the sound transmission means via the Eustachian tube to the bones of the middle ear of the person.
The transmission especially of low-frequency audio waves by sound transmission means positioned in the vicinity of the breastbone of a person via the Eustachian tube to the bones of the middle ear provides on the one hand the particular advantage that the eardrum and, thus, the dampening effect of the eardrum are bypassed. Accordingly, there is no need for compensation of the dampening effect, for example by variable audio amplification of the like, in order to achieve transmission of low-frequency audio signals in a way properly adapted to human hearing.
On the other hand, it is an advantage that by arranging the sound transmission means in the vicinity of the breastbone the vibrations are transmitted to the entire chest cavity, the breastbone being connected with the ribs and, via the latter, with the pleura. The chest cavity in its turn setsthe air in the lobes of the lung into vibration. From there, the vibrations propagate via the pharyngeal tube to the Eustachian tube and from there to the bones of the middle ear. It is the advantage of this arrangement that the entire chest cavity is used as a resonator forming sort of a band pass filter similar to the well-known subwoofer. One thereby obtains a particularly advantageous transmission, especially of low-frequency audio signals, while bypassing the eardrum.
The process can be realized with simple technical means and requires only a relatively low amount of energy. It can, accordingly, also be effected in a mobile device.
In order to transmit the entire frequency spectrum of audio waves previously mentioned, an especially profitable embodiment of the process provides that the audio signals are additionally transmitted via another sound transmission means, for example a loudspeaker of a headphone, which would make possible the coupling of acoustic signals to the eardrum of the person.
In such a manner mid- and/or higher-frequency waves, in particular, could be transmitted in a conventional manner to the eardrum while at the same time, independent to this, lower-frequency waves will be additionally transmitted in an especially effective way via sound transmission means which for example could be placed in the area of the breastbone of a person.
The sound transmission means could be a loudspeaker or a resonator or the like, all known as such.
The stated object is also achieved according to the invention by a device for the transmission of sound with at least one sound transmission means, in which the at least one sound transmission means is positioned in the chest region of a person in the vicinity of the breastbone, so that a direct -sound transmission path from the sound transmission means via the Eustachian tube to the bones of the middle ear of the person is obtained.
In particular, regarding the selection of audio signals that are transmitted via sound transmission means placed in this way in the vicinity of the breastbone of a person, it is particularly advantageous that the at least one sound transmission means is preceded by at least one distribution device for the distribution of the sound signals.
Principally speaking, the most varied configurations of distribution devices could be used; advantageously the at least one distribution device includes at least one frequency filter device.
With regard to the frequency filter means, the most varied configurations are conceivable; advantageously the frequency filter is a low pass which, technically speaking, would be easy to realize.
Also possible, however, would be that the frequency filter device involve a frequency switch and a low pass, as well as a high pass - whereby mid-and high-frequency waves passing through the high pass would be transmitted via a further transmission means which emits sound coupled to the eardrum of the person.
Sound transfer devices which could 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:
Fig. 1: a schematic flowchart of the inventive process for transmission of sound;
Fig. 2: an inventive device for transmission of sound.
The invention concerning the transmission of sound is best described on the basis of fig. 1. As can be seen in fig. 1, sound signals are conveyed from a sound source (40) to a distribution means (50). In principle, a multiplicity of apparatuses could be considered respective to the use as distribution means (50). For example a frequency filter means or a frequency switch which, further, could for example be realized via a low pass (20) and a high pass (30). Higher-frequency sound signals would thereby be transferred via the eardrum (60) to the inner ear (80) whereas lower-frequency sound signals would be transmitted over the breastbone (70) to the inner ear (80). The transfer is effected for instance via loudspeakers (27), (37) whereby the subsequently switched loudspeakers (27) coupled with the low pass is positioned in the vicinity of the breastbone (70), while the loudspeaker linked to the high pass (37) is exemplarily presented in the form of a headphone. It goes without saying that the lower-frequency sound signals can be additionally transmitted via the loudspeaker (37).
An example of such a setup for the transmission of sound, which is given in figure 2, includes a sound pickup or transmission device (10), for example a tape recorder or a microphone with an activated amplifier, which transmits signals over a signal line (11) to the frequency filter means in the form a low-pass (20) and high-pass (30).
Only lower-frequency sound signals pass through the low-pass (20), where the low-pass (20) is so constructed that only sound signals lower than 700 Hz can pass through it, while at the same time mid- and higher-frequency sound signals above 700 Hz of the sound signals are filtered out of the low-pass (20).
Contrastingly, only mid- and/or higher-frequency sound signals above 700 Hz pass through the high-pass (30) while sound signals under 700 Hz are filtered out of the sound signals of the high-pass (30).
Regarding the low-pass (20) as well as the high-pass (39), appropriately engineered amplifiers (25), (35) can be subsequently activated respective to their assigned frequency ranges - such frequencies of which are, in turn, transmitted by the amplifiers to the loudspeakers (27), (37).
As mentioned above, the loudspeaker (27) is arranged in the vicinity of the breastbone (70) of a person so that a direct sound transmission path from the loudspeaker (27) over the chest cavity, to the Eustachian tubes, and then to the bones of the middle ear results. The chest cavity of the person functions, hereby, as an additional resonating body similar to that used for the transmission of low-frequency sound signals in audiotechnics -- a subwoofer.
The loudspeaker (37) can, for example, be the familiar loudspeaker, or as has already been mentioned above, a headphone or anything similar which can make possible the coupling of sound via the eardrum of a person (69).
Via this is technical apparatus, mid- and higher-frequency sound signals are transmitted in an already well-known manner by utilization of the eardrum of a person (69) while lower-frequency sound signals are essentially transferred over the chest cavity and the Eustachian tubes to the bones of the middle ear of a person (80). As a result, one achieves a particularly realistic transmission of sound, in particular that of music.
Such a technical apparatus can be realized on the basis of simple technical means. Such a system is light, compact and portable and is, accordingly, useable everywhere, anytime. Particularly so in the case of portable devices similar to cassette recorders or CD-players. Further, such a system requires very little energy and can be even driven by battery, whereby, such a system would be independent of external energy sources. Finally, such a system, on the basis of the preceding argumentation, is also particularly economical to manufacture and is, accordingly, also a good value for the customer.
Claims (11)
1. Process for the transmission of sound by means of at least one sound transmission means (27, 37) which emits sound signals perceivable by a person, wherein the at least one sound transmission means (27) is placed on the body of a person, characterized in that the sound transmission means (27) are arranged in the chest region, in the vicinity of the breastbone (70) of the person so that a direct sound transmission path from the sound transmission means (27) via the Eustachian tube to the bones of the middle ear of the person is achieved.
2. Process of claim 1, characterized by the additional transmission of the sound signals via further sound transmission means (37) which makes possible the linking of the sound signals to the eardrum (60) of a person.
3. Process according to claim 1 or 2, characterized in that the sound transmission means (27, 37) are loudspeakers.
4. Process according to claims 1 or 2, characterized in that the sound transmission means (27, 37) are resonators.
5. Device for the transmission of sound by means of at least one sound transmission means (27, 37), characterized in that the at least one sound transmission means (27) is placed in the chest region, in the vicinity of the breastbone (70), of the person so that a direct sound transmission path from the sound transmission means (27) via the Eustachian tube to the bones of the middle ear of the person is achieved.
6. Device of claim 5, characterized in that the at least one sound transmission means (27, 37) is preceded by at least one distribution means (50).
7. Device of claim 5 or 6, characterized in that the at least one distribution means (50) includes at least one frequency filter means.
8. Device of claim 7, characterized in that the at least one frequency filter means is a low-pass (20).
9. Device of claim 7, characterized in that the at least one frequency filter means includes a low-pass (20), as well as a high-pass (30) and that the mid- and/or higher-frequency sound signals passing through the high-pass are conveyed via a further sound transmission means (37) in association with the eardrum of a person.
10. Device according to one of claims 5 through 9, characterized in that the sound transmission means (27, 37) are loudspeakers.
11. Device according to one of claims 5 through 9, characterized in that the sound transmission means (27, 37) are resonators.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE1996109554 DE19609554C1 (en) | 1996-03-12 | 1996-03-12 | Transmission of tape-recorded music and speech to a listener |
| DE29604457.1 | 1996-03-12 | ||
| DE29604457U DE29604457U1 (en) | 1996-03-12 | 1996-03-12 | Device for transmitting sound |
| DE19609554.9 | 1996-03-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2248019A1 true CA2248019A1 (en) | 1997-09-18 |
Family
ID=26023685
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002248019A Abandoned CA2248019A1 (en) | 1996-03-12 | 1997-03-06 | Process and device for transmitting sound |
Country Status (24)
| Country | Link |
|---|---|
| EP (1) | EP0886990B1 (en) |
| JP (1) | JP2000506353A (en) |
| KR (1) | KR19990087652A (en) |
| CN (1) | CN1218603A (en) |
| AT (1) | ATE185039T1 (en) |
| AU (1) | AU722530B2 (en) |
| BG (1) | BG102762A (en) |
| BR (1) | BR9707983A (en) |
| CA (1) | CA2248019A1 (en) |
| CZ (1) | CZ287048B6 (en) |
| DE (1) | DE59700475D1 (en) |
| EA (1) | EA199800823A1 (en) |
| ES (1) | ES2139453T3 (en) |
| GR (1) | GR3032205T3 (en) |
| HU (1) | HUP9901797A3 (en) |
| IL (1) | IL126090A0 (en) |
| NO (1) | NO984192L (en) |
| NZ (1) | NZ331597A (en) |
| PL (1) | PL329006A1 (en) |
| SK (1) | SK125598A3 (en) |
| TR (1) | TR199801820T2 (en) |
| TW (1) | TW404145B (en) |
| WO (1) | WO1997034441A1 (en) |
| YU (1) | YU39898A (en) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3792754A (en) * | 1972-05-19 | 1974-02-19 | Hear Muffs | Headphone assembly |
| DE2451977C2 (en) * | 1973-11-05 | 1982-06-03 | St. Louis University, St. Louis, Mo. | Method and device for recording and reproducing the sound generated by a person's voice |
| DE2608908A1 (en) * | 1976-03-04 | 1977-09-08 | Johannes Dipl Phys Dr Lensing | Stereo headphones with third transducer on top of head - uses third transducer to induce sound waves in bones and avoid front location error |
| US4322585A (en) * | 1980-05-05 | 1982-03-30 | Liautaud James P | Personal electronic listening system with an air and bone transducer mounted on the clothing collar |
| US4641345A (en) * | 1983-10-28 | 1987-02-03 | Pioneer Electronic Corporation | Body-sensible acoustic device |
| KR920002929Y1 (en) * | 1990-02-17 | 1992-05-08 | 이정기 | Speaker |
-
1997
- 1997-03-06 DE DE59700475T patent/DE59700475D1/en not_active Expired - Lifetime
- 1997-03-06 KR KR1019980707112A patent/KR19990087652A/en not_active Application Discontinuation
- 1997-03-06 AU AU23796/97A patent/AU722530B2/en not_active Ceased
- 1997-03-06 IL IL12609097A patent/IL126090A0/en unknown
- 1997-03-06 JP JP9532187A patent/JP2000506353A/en active Pending
- 1997-03-06 SK SK1255-98A patent/SK125598A3/en unknown
- 1997-03-06 CN CN97194598A patent/CN1218603A/en active Pending
- 1997-03-06 TR TR1998/01820T patent/TR199801820T2/en unknown
- 1997-03-06 NZ NZ331597A patent/NZ331597A/en unknown
- 1997-03-06 CZ CZ19982891A patent/CZ287048B6/en unknown
- 1997-03-06 EP EP97919261A patent/EP0886990B1/en not_active Expired - Lifetime
- 1997-03-06 ES ES97919261T patent/ES2139453T3/en not_active Expired - Lifetime
- 1997-03-06 PL PL97329006A patent/PL329006A1/en unknown
- 1997-03-06 AT AT97919261T patent/ATE185039T1/en not_active IP Right Cessation
- 1997-03-06 WO PCT/DE1997/000466 patent/WO1997034441A1/en not_active Application Discontinuation
- 1997-03-06 CA CA002248019A patent/CA2248019A1/en not_active Abandoned
- 1997-03-06 HU HU9901797A patent/HUP9901797A3/en unknown
- 1997-03-06 BR BR9707983-9A patent/BR9707983A/en not_active Application Discontinuation
- 1997-03-07 TW TW086102783A patent/TW404145B/en not_active IP Right Cessation
-
1998
- 1998-09-10 BG BG102762A patent/BG102762A/en unknown
- 1998-09-11 YU YU39898A patent/YU39898A/en unknown
- 1998-09-11 NO NO984192A patent/NO984192L/en not_active Application Discontinuation
- 1998-10-09 EA EA199800823A patent/EA199800823A1/en unknown
-
1999
- 1999-12-21 GR GR990403292T patent/GR3032205T3/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| ATE185039T1 (en) | 1999-10-15 |
| EA199800823A1 (en) | 1999-02-25 |
| TW404145B (en) | 2000-09-01 |
| KR19990087652A (en) | 1999-12-27 |
| YU39898A (en) | 1999-09-27 |
| TR199801820T2 (en) | 1998-12-21 |
| AU2379697A (en) | 1997-10-01 |
| CZ287048B6 (en) | 2000-08-16 |
| DE59700475D1 (en) | 1999-10-28 |
| CN1218603A (en) | 1999-06-02 |
| WO1997034441A1 (en) | 1997-09-18 |
| BG102762A (en) | 1999-03-31 |
| JP2000506353A (en) | 2000-05-23 |
| GR3032205T3 (en) | 2000-04-27 |
| HUP9901797A2 (en) | 1999-09-28 |
| EP0886990A1 (en) | 1998-12-30 |
| ES2139453T3 (en) | 2000-02-01 |
| IL126090A0 (en) | 1999-05-09 |
| CZ289198A3 (en) | 1998-12-16 |
| NO984192D0 (en) | 1998-09-11 |
| HUP9901797A3 (en) | 2000-08-28 |
| BR9707983A (en) | 2000-01-04 |
| NZ331597A (en) | 2000-01-28 |
| NO984192L (en) | 1998-09-11 |
| PL329006A1 (en) | 1999-03-01 |
| SK125598A3 (en) | 1999-04-13 |
| AU722530B2 (en) | 2000-08-03 |
| EP0886990B1 (en) | 1999-09-22 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued |