09
An audio system, namely, a radio transmitter and a number of
wireless headphone receivers, where the transmitter receives
an audio signal from an audio source and transmits the audio
signal over-the-air to the number of wireless headphone
receivers, and a carrying case especially adapted for
housing the transmitter and wireless headphone receivers and
serving as an electrical charging station for the
transmitter and wireless headphone receivers; radio
transmitters; wireless radio transmitters; portable wireless
radio transmitters; wireless audio receivers; wireless audio
headphone receivers; wireless headphones; carrying cases
especially adapted for housing a radio transmitter and a
number of wireless headphone receivers and serving as an
electrical charging station for the transmitter and wireless
headphone receivers; wireless headsets; wireless earphones;
wireless speakers; microphones; wireless microphones;
assistive listening systems and devices not for medical
purposes; neckloops; neckloop amplifiers; audio input
adapters; software for improving audio sound quality of
wireless receivers and wireless headphone receivers;
software for configuring the audio signal frequency response
in wireless headphones to improve sound quality, including
optimizing for voice clarity; and software for configuring
the audio signal frequency response in wireless headphones
based on the hearing response or audiogram of a user's ears,
to improve sound quality specifically for the user
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