Radio frequency shielding for receivers within hearing aids and listening devices

A method of suppressing electromagnetic emissions from a receiver in a listening device, comprising:

• forming an electrically conductive shield around a substantial portion of said receiver;
• and
• electrically connecting said electrically conductive shield to audio signal processing circuitry within said receiver;
• wherein said electrically conductive shield suppresses said electromagnetic emissions in a passive manner.

An electromagnetic shield for a receiver in a listening device, comprising:

• at least one electrically conductive wire wound into a coil substantially surrounding said receiver;
• and
• means for forming said coil into a closed electrical loop, said coil having substantially no current supplied thereto;
• and
• means for electrically connecting said coil to audio signal processing circuitry within said receiver.

A receiver for a listening device, comprising:

• a switching amplifier;
• audio signal processing circuitry connected to said switching amplifier and configured to convert an audio signal into an acoustic signal;
• a housing enclosing said audio signal processing circuitry and said switching amplifier;
• and
• an electrically conductive coil surrounding a substantial portion of said housing for suppressing electromagnetic emissions from said switching amplifier in a passive manner, said electrically conductive coil forming a closed electrical circuit and electrically connected to a system ground of said audio signal processing circuitry, said electrically conductive coil having a predetermined number of turns based on a frequency of said electromagnetic emissions to be suppressed.