Method and apparatus for own-voice sensing in a hearing assistance device
Disclosed herein, among other things, are methods and apparatus for own-voice sensing in hearing assistance devices. One aspect of the present subject matter includes an in-the-ear (ITE) hearing assistance device adapted to process sounds, including sounds from a wearer's mouth. According to various embodiments, the device includes a hollow plastic housing adapted to be worn in the ear of the wearer and a differential sensor mounted to an interior surface of the housing in an ear canal of the wearer. The differential sensor includes inlets located within the housing and the differential sensor is configured to improve speech intelligibility of sounds from the wearer's mouth, in various embodiments.
1. A hearing assistance device adapted to process sounds, including sounds from a wearer's mouth, comprising:
a hollow plastic housing adapted to be worn in an ear of the wearer, the housing including a barrier portion to separate air cavities within the housing; and
a vibration sensor enclosed in an enclosure located within the housing, the enclosure mounted indirectly to an interior surface of the housing using a mechanical resonator, the vibration sensor configured to amplify an input signal in selected frequency regions to improve speech intelligibility of sounds from the wearer's mouth, wherein the mechanical resonator, the barrier portion and the housing include materials having resonance frequencies configured to enhance output of the vibration sensor in the selected frequency regions to improve speech intelligibility.
2. The hearing assistance device of claim 1 , wherein the vibration sensor includes a microelectromechanical system (MEMS) sensor.
3. The hearing assistance device of claim 1 , wherein the vibration sensor includes a differential sensor.
4. The hearing assistance device of claim 1 , wherein the vibration sensor includes a piezoceramic sensor.
5. The hearing assistance device of claim 1 , wherein the mechanical resonator includes a mounting suspension stiffness configured to resonate with a mass of the vibration sensor.
6. The hearing assistance device of claim 1 , wherein at least one of the mechanical resonator and the vibration sensor includes a ceramic material.
7. The hearing assistance device of claim 1 , wherein the vibration sensor is configured to amplify bone-conducted vibrations.
8. The hearing assistance device of claim 1 , wherein the hearing assistance device includes a hearing aid.
9. The hearing assistance device of claim 8 , wherein the hearing aid includes an in-the-ear (ITE) hearing aid.
10. The hearing assistance device of claim 8 , wherein the hearing aid includes an in-the-canal (ITC) hearing aid.
11. The hearing assistance device of claim 8 , wherein the hearing aid includes a receiver-in-canal (RIC) hearing aid.
12. The hearing assistance device of claim 8 , wherein the hearing aid includes a completely-in-the-canal (CIC) hearing aid.
13. A method of making a hearing assistance device for a wearer, the method comprising:
indirectly mounting a vibration sensor to an interior surface of a hollow plastic housing of the device using a mechanical resonator system, and
configuring the housing to include a barrier portion to separate air cavities within the housing,
wherein the vibration sensor is configured to amplify an input signal in selected frequency regions to improve speech intelligibility of sounds from the wearer's mouth, and
wherein the mechanical resonator system, the barrier portion and the housing include materials having resonance frequencies configured to enhance an output audio signal of the vibration sensor in the selected frequency regions to improve speech intelligibility.
14. The method of claim 13 , wherein the mechanical resonator system is configured to resonate with the vibration sensor so as to amplify and enhance a response of the vibration sensor in Speech Intelligibility Index (SII) weighted frequency bands.
15. The method of claim 13 , wherein the mechanical resonator system includes a mounting suspension stiffness configured to resonate with a mass of the vibration sensor.
16. The method of claim 13 , wherein at least one of the mechanical resonator system and the vibration sensor includes a ceramic material.
17. A method of making a hearing assistance device for a wearer, the method comprising:
directly mounting a vibration sensor to an interior surface of a hollow plastic housing of the device, and
configuring the housing to include a barrier portion to separate air cavities within the housing,
wherein the vibration sensor includes a sleeve and is configured to amplify an input signal in selected frequency regions, and wherein the sleeve, the barrier portion and the housing include materials having resonance frequencies configured to enhance an output audio signal of the vibration sensor in the selected frequency regions to improve speech intelligibility.
18. The method of claim 17 , wherein the vibration sensor includes a microelectromechanical system (MEMS) sensor.
19. The method of claim 17 , wherein the vibration sensor includes a differential sensor.
20. The method of claim 17 , wherein the vibration sensor includes a piezoceramic sensor.