Narrative of experimentation

0885-EX-ST-2013 Text Documents

Sennheiser Electronic Corporation

2013-09-16ELS_141372

Narrative Statement

Sennheiser Electronic Corporation requests this license in order to experiment with a novel form
of entertainment that has possible applications to public safety.

Sennheiser plans to produce “silent opera” performances in which each member of the audience
hears the performers though wireless headphones, allowing both the performers and the audience
to be mobile and interactive throughout a performance space of approximately 100 meters radius.
The space is part of a public area, namely, Union Station in Los Angeles. Vocalists will sing live
as they move through the station. The use of wireless headphones eliminates the need for area-
wide amplification, delivers a private experience to each listener, and protects persons in the
station who are not part of the audience from being disturbed.

Sennheiser plans to use off-the-shelf FM wireless headphones (Sennheiser models HDR110 and
HDR 120-II) with receiving frequencies 926-928 MHz. The transmitter will be a professional
model SR 3056 or SR 3256 stereo transmitter having a maximum output power of 100 mW
modified to operate at 926-928 MHz. The unmodified versions are certified under FCC IDs
DMOFT30UMB and DMO2SREK3K respectively. Because the modifications for this project
will take the transmitters out of compliance with their certifications, Sennheiser will not label the
modified transmitters with FCC IDs and will not market them.

The system to be used in this experiment has potential applications beyond entertainment, such
as translation, guidance for the disabled, and emergency instructions within a public space.

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Document Created: 2013-09-16 21:44:22
Document Modified: 2013-09-16 21:44:22

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