Hearing aid having improved RF immunity to RF electromagnetic interference produced from a wireless communications device
AssigneeResearch In Motion Limited
InventorsLizhong Zhu, George Mankaruse, Michael Corrigan
Life of this patent
Estimating the term…
Abstract
A hearing aid has improved immunity to RF electromagnetic interference produced from wireless communications devices. A microphone receives audio signals from the environment. Audio circuitry is connected to the microphone and amplifies the audio signals. A speaker is connected to the audio circuitry and directs the audio signals into an ear canal of the user of the hearing aid. The audio connection lines connect the microphone and audio circuitry and the speaker and audio circuitry. A filter is connected into each of the audio connection lines and operative for reducing the RF coupling from a wireless communications device.
Claims24
A hearing aid having improved immunity to RF electromagnetic interference produced from wireless communications devices comprising:
- a microphone for receiving audio signals from the environment;
- audio circuitry including a processor connected to the microphone for amplifying the audio signals;
- a speaker connected to said audio circuitry for directing the audio signals into an ear of a user using the hearing aid, and further comprising audio connection lines connecting the microphone and audio circuitry and the speaker and audio circuitry and microphone bias lines connecting the processor and microphone;
- and
- a filter connected into at least one of the audio connection lines and microphone bias lines and operative for reducing the RF coupling from a wireless communications device.
A method of making a hearing aid having improved immunity to RF electromagnetic interference produced from wireless communications devices, which comprises:
- providing a microphone for receiving audio signals from the environment, audio circuitry and a processor connected to the microphone for amplifying the audio signals, and a speaker connected to said audio circuitry for directing the audio signals into an ear canal of a user of the hearing aid, comprising audio connection lines connecting the microphone and audio circuitry and the speaker and audio circuitry and microphone bias lines connecting the processor and microphone;
- and
- reducing the RF coupling from a wireless communications device by connecting a filter into at least one of the audio connection lines and microphone bias lines that connect the speaker and microphone and processor with the audio circuitry.
Dependencies are inferred from the claim text.