Acoustic sound routing in vehicles
First Claim
1. An acoustic apparatus for producing audio signals,wherein the sound transducer and the at least one sound emergence location are physically separate from one another,in which the sound transducer is connected to the sound emergence location by means of at least one air-guiding sound conduit,wherein the at least one sound emergence location is provided with a means for achieving acoustic impedance matching for the air in the sound conduit and the ambient air in order to reduce resonance effects,wherein the means for acoustic resonance matching is made of a material which has the acoustic impedance of air, andwherein this material is placed in two dimensions and contiguously over the at least one sound emergence location.
2 Assignments
0 Petitions
Accused Products
Abstract
To ensure the same high quality of acoustic radiation from audio systems on each seat of current vehicles, an acoustic device is provided for generating audio signals, which allows sound sources to be integrated into the area located near the headrest of a vehicle seat such that the volume can be regulated in an individual manner without unduly disturbing the other passengers in a vehicle. The headrest does not comprise any loudspeakers, thus is safe regarding accident protection. The acoustic near field at the headrest is generated by means of a sound channel. The loudspeaker is disposed inside the backrest or under the seat, for example, while the sound channel terminates in the headrest. Tuned pipes, the end of which is adjusted to the acoustic impedance of the clearance zone, are used as a sound channel.
20 Citations
13 Claims
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1. An acoustic apparatus for producing audio signals,
wherein the sound transducer and the at least one sound emergence location are physically separate from one another, in which the sound transducer is connected to the sound emergence location by means of at least one air-guiding sound conduit, wherein the at least one sound emergence location is provided with a means for achieving acoustic impedance matching for the air in the sound conduit and the ambient air in order to reduce resonance effects, wherein the means for acoustic resonance matching is made of a material which has the acoustic impedance of air, and wherein this material is placed in two dimensions and contiguously over the at least one sound emergence location.
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5. An acoustic apparatus for producing audio signals,
in which the sound transducer and the at least one sound emergence location are physically separate from one another, in which the sound transducer is connected to the sound emergence location by means of at least one air-guiding sound conduit, and in which the at least one sound emergence location is provided with a means for achieving acoustic impedance matching for the air in the sound conduit and the ambient air in order to reduce resonance effects, and the means for acoustic resonance matching is made of a material which has the acoustic impedance of air, wherein this material is placed in two dimensions and contiguously over the at least one sound emergence location, wherein the apparatus has at least two sound conduits, where the sound emerging jointly from the sound conduits has a high sound level through superimposition in a preferred direction and has a lower sound level in an unwanted direction as a result of the design of the sound conduit and/or as a result of the manner in which the sound is supplied by the sound transducer, wherein the sound emergence locations of the individual sound conduits are arranged relative to one another such that a flat radiating element is produced, and wherein the flat radiating element comprises individual conventional loudspeakers in addition to the sound emergence locations of the individual sound conduits.
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7. An acoustic apparatus for producing audio signals,
in which the sound transducer and the at least one sound emergence location are physically separate from one another, in which the sound transducer is connected to the sound emergence location by means of at least one air-guiding sound conduit, and in which the at least one sound emergence location is provided with a means for achieving acoustic impedance matching for the air in the sound conduit and the ambient air in order to reduce resonance effects, and the means for acoustic resonance matching is made of a material which has the acoustic impedance of air, wherein this material is placed in two dimensions and contiguously over the at least one sound emergence location and wherein to produce acoustic directivity the sound emergence locations are firstly arranged like a flat panel loudspeaker, but secondly directivity is also obtained through antiphase cancellation.
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8. An acoustic apparatus for producing audio signals,
in which the sound transducer and the at least one sound emergence location are physically separate from one another, in which the sound transducer is connected to the sound emergence location by means of at least one air-guiding sound conduit, and in which the at least one sound emergence location is provided with a means for achieving acoustic impedance matching for the air in the sound conduit and the ambient air in order to reduce resonance effects, and the means for acoustic resonance matching is made of a material which has the acoustic impedance of air, wherein this material is placed in two dimensions and contiguously over the at least one sound emergence location, and wherein the sound transducer used is an isobaric push/pull system.
Specification