Method and apparatus for a binaural hearing assistance system using monaural audio signals
The present application provides method and apparatus for a binaural hearing assistance system using a monaural audio signal input. The system, in various examples, provides adjustable delay/phase adjustment and sound level adjustment. Different embodiments are provided for receiving the monaural signal and distributing it to a plurality of hearing assistance devices. Different relaying modes are provided. Special functions are supported, such as telecoil functions. The system also has examples that account for a head-related transfer function in providing advanced sound processing for the wearer. Other examples are provided that are described in the detailed description.
1. A method for providing a sound to a listener having first and second ears, the method comprising:
receiving a monaural information signal;
converting the monaural information signal into first and second output signals using a processor, including introducing a phase difference between the first and second output signals;
receiving a control signal;
adjusting the phase difference using the control signal; and
providing the sound to the listener to be perceived by the listener as a binaural sound having an interaural difference, including:
providing a first sound based on the first output signal to the first ear using a first speaker; and
providing a second sound based on the second output signal to the second ear using a second speaker.
2. The method of claim 1 , further comprising varying the phase difference as a function of frequency.
3. The method of claim 1 , further comprising adjusting the phase difference using time-domain filters.
4. The method of claim 1 , further comprising adjusting the phase difference based on a head-related transfer function.
5. The method of claim 1 , wherein receiving the control signal comprises receiving the control signal from one or more switches operable by the listener.
6. The method of claim 1 , wherein converting the monaural information signal into the first and second output signals further comprises introducing a level difference between the first and second output signals, and further comprising adjusting the level difference using the control signal.
7. The method of claim 1 , wherein receiving the control signal comprises receiving a signal indicating a telephone in proximity or ringing.
8. The method of claim 7 , comprising lateralizing the binaural sound perceived by the listener in response to the control signal indicating the telephone in proximity.
9. The method of claim 1 , wherein receiving the monaural information signal comprises receiving the monaural information signal from a wireless device.
10. The method of claim 9 , wherein receiving the monaural information signal from the wireless device comprises receiving the monaural information signal from a cell phone.
11. The method of claim 9 , wherein receiving the monaural information signal from the wireless device comprises receiving the monaural information signal as packetized audio from a wireless audio controller.
12. The method of claim 9 , further comprising transmitting the listener's voice to the wireless device.
13. A system for providing a sound to a listener having first and second ears, the system comprising:
a processor configured to receive a monaural information signal, to convert the monaural input signal into first and second output signals with a phase difference between the first and second output signals, to receive a control signal, and to adjust the phase difference using the control signal; and
a pair of audio devices configured to provide the sound to the listener as a binaural sound having an interaural difference perceivable by the listener, the pair of audio devices including:
a first speaker configured to provide a first sound to the first ear based on the first output signal; and
a second speaker configured to provide a second sound to the second ear based on the second output signal.
14. The system of claim 13 , wherein the processor is further configured to convert the monaural input signal into the first and second output signals with a level difference and to adjust the level difference using the control signal.
15. The system of claim 13 , further comprising a radio receiver coupled to the processor and configured to receive the monoaural information signal wirelessly and to transmit the wirelessly received monoaural information signal to the processor.
16. The system of claim 13 , wherein the processor is configured to generate a head-related transfer function and to control the phase difference based on the head-related transfer function.
17. The system of claim 13 , further comprising one or more switches configured to receive the control signal from the listener.
18. The system of claim 13 , wherein the processor is configured to adjust the phase difference using time-domain filters.
19. The system of claim 13 , wherein the pair of audio devices comprises pair of first and second hearing assistance devices, the first hearing assistance device including the first speaker, the second hearing assistance device including the second speaker.
20. The system of claim 19 , wherein the pair of first and second hearing assistance devices comprises a pair of first and second hearing aids.