Contact hearing systems, apparatus and methods
The present invention is directed to a hearing aid which includes a lateral ear canal assembly and a medial ear canal assembly. In embodiments of the invention the medial ear canal assembly may include smart circuitry adapted to control parameters and outputs of the medial ear canal assembly. In embodiments of the invention various methods and circuitry are described, wherein the methods and circuitry are adapted to improve the performance and efficiency of the hearing aid.
1. A method of transmitting data from a lateral ear canal assembly to a medial ear canal assembly, the method comprising:
modulating the data;
exciting a first coil on the lateral ear canal assembly with the modulated data such that the first coil generates a magnetic field, the lateral ear canal assembly being positioned in an ear canal of a user;
receiving the generated magnetic field at the medial ear canal assembly and generating a received signal representative of the modulated signal, the medial ear canal assembly being positioned in the ear canal of the user and on a tympanic membrane of the user and medially of the lateral ear canal assembly; and
passing the received signal through a diode rectifying circuit to generate a demodulated signal;
using the demodulated signal to generate a drive signal; and
using the drive signal to drive a microactuator positioned on the medial ear canal assembly, wherein the microactuator comprises a balanced armature transducer connected to the tympanic membrane of the user through an umbo lens, and wherein the microactuator is driven to vibrate the tympanic membrane, generating user perceptible sound.
2. A method according to claim 1 , wherein the received signal comprises an electrical current which is induced in a second coil by the magnetic field and wherein the second coil is positioned on the medial ear canal assembly.
3. A method according to claim 1 , wherein the received signal comprises an electrical voltage induced across a second coil by the magnetic field and wherein the second coil is positioned on the medial ear canal assembly.
4. A method of transmitting data from a lateral ear canal assembly to a medial ear canal assembly, the method comprising:
exciting a first coil on the lateral ear canal assembly to generate a magnetic field, the lateral ear canal assembly being positioned in an ear canal of a user;
receiving at least a portion of the generated magnetic field at a second coil positioned on the medial ear canal assembly, wherein the medial ear canal assembly is positioned in the ear canal of the user and on a tympanic membrane of the user and medially of the lateral ear canal assembly, and wherein the received magnetic field induces a received signal in the second coil;
rectifying the output of the second coil by passing the output of the second coil through a diode rectifying circuit; and
transmitting at least a portion of the rectified output to a load positioned on the medial ear canal assembly, wherein the load comprises a balanced armature transducer connected to an umbo lens, and wherein the balanced armature transducer is driven to vibrate the tympanic membrane via the umbo lens, generating user perceptible sound.
5. A method according to claim 4 , wherein the load comprises a vibratory element adapted to vibrate in response to the rectified output.
6. A method according to claim 4 , wherein the received signal comprises a voltage induced across the second coil.
7. A method according to claim 4 , wherein the received signal comprises a current induced in the second coil.
8. A method according to claim 4 , wherein the first coil is excited with a signal having a push/pull format.
9. A method according to claim 4 , wherein the first coil is excited with a signal having a zero crossing.
10. A method according to claim 4 , wherein the balanced armature transducer comprises a winding, wherein the diode rectifiying circuit is connected between an output of the second coil and the load positioned on the medial ear canal assembly, and wherein the diode rectifiying circuit comprises a diode and a capacitor, wherein the diode of the diode rectifying circuity has an input and an output, wherein the input is connected to the output of the second coil and the output is connected to the winding of the balanced armature transducer, and wherein the capacitor of the diode rectifying circuit is connected between the output of the diode and the second coil.
11. A method according to claim 4 , wherein a transmission path between the lateral ear canal assembly and the medial ear canal assembly comprises only air in the ear canal.
12. A method according to claim 4 , wherein the lateral ear canal assembly is separated from the medial ear canal assembly in the ear canal by only air.
13. A method according to claim 2 , wherein the balanced armature transducer comprises a winding, wherein the diode rectifiying circuit is connected between an output of the second coil and the microactuator, and wherein the diode rectifiying circuit comprises a diode and a capacitor, wherein the diode of the diode rectifying circuity has an input and an output, wherein the input is connected to the output of the second coil and the output is connected to the winding of the balanced armature transducer, and wherein the capacitor of the diode rectifying circuit is connected between the output of the diode and the second coil.
14. A method according to claim 1 , wherein the first coil is excited with a signal having a push/pull format.
15. A method according to claim 1 , wherein the first coil is excited with a signal having a zero crossing.
16. A method according to claim 1 , wherein a transmission path between the lateral ear canal assembly and the medial ear canal assembly comprises only air in the ear canal.
17. A method according to claim 1 , wherein the lateral ear canal assembly is separated from the medial ear canal assembly in the ear canal by only air.