Sennheiser SpeechLine Digital Wireless Series System Documentation page 7

Focus on the spoken word
Meetings
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Good speech intelligibility and easy handling of the microphone system are
important requirements for professional meetings. The larger the confer-
ence or training room, the more helpful is an audio system which enhances
speech intelligibility. In large conference rooms in particular, a speaker
seated at one end is difficult to understand at the other end. When the
speaker turns in different directions, for example in order to address indi-
vidual participants, he is difficult to understand in the other direction in
each case. SpeechLine Digital Wireless does not restrict the freedom of
movement of active speakers.
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