Patent ID: 7616973

Claim:
A portable audio device having reduced sensitivity to RF interference over a predetermined frequency range from an adjacent mobile wireless communications device comprising: a portable housing; a battery carried by said portable housing; a recharging power input connected to said battery; a digital signal input; an audio analog signal output; a memory carried by said portable housing and powered by said battery for storing digital audio files input thereto via said digital signal input; a digital-to-analog converter (DAC) carried by said portable housing and powered by said battery for converting a selected digital audio file from said memory into an analog audio signal; an audio analog amplifier connected between said DAC and said audio analog signal output; at least one first RF filter connected to said recharging power input for reducing RE interference over the predetermined frequency range from the adjacent mobile wireless communications device; and at least one second RF filter connected to said audio analog signal output for reducing RF interference over the predetermined frequency range from the adjacent mobile wireless communications device.