Enhanced sound perception via regulated vibration
A technique for joint production of vibration and sound is provided. According to an example embodiment, the technique is provided by an apparatus including a unit for jointly producing vibration and sound to reproduce an input audio signal provided as input thereto, the unit arranged inside a padding to generate mechanical vibration that is perceivable as a vibration and sound on at least one outer surface of the padding and to radiate the sound through the at least one outer surface of the padding and a unit for regulating perceivable intensity of vibration in dependence of at least one characteristic of the input audio signal.
1. An apparatus for joint production of vibration and sound, the apparatus comprising:
a sound reproduction system configured to jointly produce vibration and sound and configured to reproduce an input audio signal provided as input thereto, said sound reproduction system comprising at least one mechanical actuator and at least one board disposed inside a padding, said at least one mechanical actuator being configured to vibrate said at least one board in accordance with the input audio signal to generate mechanical vibration that is perceivable as a vibration and sound on at least one outer surface of the padding and to radiate the sound through said at least one outer surface of the padding; and
a regulation assembly configured to regulate a perceivable intensity of vibration depending on at least one characteristic of the input audio signal, the regulation assembly configured to
increase a magnitude of the produced vibration below a first predefined frequency point, said increasing the magnitude comprising multiplying the input audio signal below the first predefined frequency point by a first scaling factor that has a value greater than unity, and
limit the perceivable intensity of the produced vibration in response to the magnitude of the produced vibration exceeding a predefined magnitude threshold, said limiting the perceivable intensity comprising multiplying the input audio signal below the first predefined frequency point by a second scaling factor that has a value smaller than unity such that the predefined magnitude threshold is not exceeded.
2. The apparatus according to claim 1 , wherein the regulation assembly is configured to compress the dynamic range of the produced vibration.
3. The apparatus according to claim 1 , wherein the regulation assembly is configured to reduce the magnitude of the produced vibration above a second predefined frequency point.
4. The apparatus according to claim 1 , wherein the regulation assembly comprises a processor configured to modify said input audio signal before passing the input audio signal to the sound reproduction system.
5. The apparatus according to claim 4 , wherein the regulation assembly is configured to modify said input audio signal by filtering the input audio signal using one or more digital filters of respective adaptive filtering characteristics, wherein each of the digital filters is adaptable depending on at least one characteristic of the input audio signal.
6. The apparatus according to claim 1 , wherein the regulation assembly comprises a mechanical structure configured to regulate the perceivable intensity of vibration depending on the at least one characteristic of the input audio signal.
7. The apparatus according to claim 1 , wherein the regulation assembly is configured to adjust the perceivable intensity of vibration and/or sound at two or more frequency bands independently of other frequency bands.
8. A method for joint production of vibration and sound, the method comprising:
jointly producing vibration and sound to reproduce an input audio signal by using a vibration system comprising at least one mechanical actuator and at least one board disposed inside a padding, said at least one mechanical actuator being configured to vibrate said at least one board in accordance with the input audio signal to generate mechanical vibration that is perceivable as a vibration and sound on at least one outer surface of the padding and to radiate the sound through said at least one outer surface of the padding; and
regulating a perceivable intensity of vibration depending on at least one characteristic of the input audio signal, said regulating comprising
increasing a magnitude of the produced vibration below a first predefined frequency point, said increasing the magnitude comprising multiplying the input audio signal below the first predefined frequency point by a first scaling factor that has a value greater than unity, and
limiting the perceivable intensity of the produced vibration in response to the magnitude of the produced vibration exceeding a predefined magnitude threshold, said limiting the perceivable intensity comprising multiplying the input audio signal below the first predefined frequency point by a second scaling factor that has a value smaller than unity such that the predefined magnitude threshold is not exceeded.
9. The apparatus according to claim 2 , wherein the regulation assembly is configured to reduce the magnitude of the produced vibration above a second predefined frequency point.
10. The apparatus according to claim 2 , wherein the regulation assembly comprises a processor configured to modify said input audio signal before passing the input audio signal to the sound reproduction system.
11. The apparatus according to claim 3 , wherein the regulation assembly comprises a processor configured to modify said input audio signal before passing the input audio signal to the sound reproduction system.
12. The apparatus according to claim 2 , wherein the regulation assembly comprises a mechanical structure configured to regulate the perceivable intensity of vibration depending on the at least one characteristic of the input audio signal.
13. The apparatus according to claim 3 , wherein the regulation assembly comprises a mechanical structure configured to regulate the perceivable intensity of vibration depending on the at least one characteristic of the input audio signal.
14. The apparatus according to claim 2 , wherein the regulation assembly is configured to adjust the perceivable intensity of vibration and/or sound at two or more frequency bands independently of other frequency bands.
15. The apparatus according to claim 3 , wherein the regulation assembly is configured to adjust the perceivable intensity of vibration and/or sound at two or more frequency bands independently of other frequency bands.
16. The apparatus according to claim 4 , wherein regulation assembly is configured to adjust the perceivable intensity of vibration and/or sound at two or more frequency bands independently of other frequency bands.
17. The apparatus according to claim 5 , wherein the regulation assembly is configured to adjust the perceivable intensity of vibration and/or sound at two or more frequency bands independently of other frequency bands.
18. The apparatus according to claim 6 , wherein the regulation assembly is configured to adjust the perceivable intensity of vibration and/or sound at two or more frequency bands independently of other frequency bands.
19. The apparatus according to claim 9 , wherein regulation assembly is configured to adjust perceivable intensity of vibration and/or sound at two or more frequency bands independently of other frequency bands.
20. The apparatus according to claim 10 , wherein the regulation assembly is configured to adjust the perceivable intensity of vibration and/or sound at two or more frequency bands independently of other frequency bands.