Earphone device with impedance correction unit
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United States of America Patent
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Sep 15, 2015
Grant Date -
Jan 31, 2013
app pub date -
Jul 27, 2012
filing date -
Jul 29, 2011
priority date (Note) -
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status (Latency Note)
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Abstract
Various aspects of this disclosure are directed to an earphone device comprising a speaker unit including at least one balanced armature transducer to convert an electrical signal into an acoustic signal. The electrical signal may define a frequency range comprising a first frequency and a second frequency. The earphone device may further comprise an impedance correction unit configured to receive the electrical signal and compliment an impedance of the speaker unit such that a sum of an impedance of the impedance correction unit and the impedance of the speaker unit at the first frequency is substantially similar to a sum of an impedance of the impedance correction unit and the impedance of the speaker unit at the second frequency.
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