User manual

:: 7
microphone, providing effective assistance in difficult listening situations, such as
conversations in loud background noise.
Television, listening to music
To reduce ambient noise when watching television, the microphone should be placed
directly in front of the TV loudspeaker or music source. As an additional benefit, the
volume of the device can be turned down so that others are not disturbed.
Most FM transmitters are equipped with an external audio input (AUX) for direct
connection of the TV or radio to the FM system. While using, the direct input sound
signals are transferred directly to the speech processor. By using the EXT or MIX
listening mode the listener can choose whether or not to suppress background noise.
We recommend using the SCART output socket (on the back of the TV) instead of the
headphone output for direct connection to FM systems. This allows others to listen
to the TV loudspeaker, whereas a connection via the headphone output suppresses
the loudspeaker.
School
Listening situations in school can be very demanding and exhausting for hearing-
impaired children, affecting their learning abilities and auditory, speech and
language development. Social interactions may also suffer from misunderstood
messages or missed acoustic information.
Noise levels of 65–90dB are often measured in schools - particularly in schools where
the furnishings and size of the classroom are not designed to support hearing-
impaired children.
Three basic listening situations can be identified in schools:
:: Free play or working freely in a group: these situations are characterized by a
babble of voices and background noise as well as a large or variable distance from
the teacher. In this case, if the teacher wears the microphone of the FM system,
the hearing-impaired child can hear the teacher’s instructions directly, despite
the high level of interfering noise.
:: Group work in smaller groups: in this situation, a hearing-impaired child should
be able to understand all members of the group to actively participate in the
discussion or project. Most benefit can be obtained from an FM system when the
speaker speaks directly into the microphone. This allows the hearing-impaired
child to follow the conversation without great effort. Speech understanding is also
facilitated by placing the microphone in the center of the group.
:: Teacher’s instructions, dictations, working in a large group: these are the most
common situations in schools. It is important for a child to be able to completely
understand and concentrate on the teacher’s instructions over a longer period of
time. An FM system enhances the teacher’s voice, thus improving the signal-to-
noise ratio. As a result, less effort is required for a hearing-impaired child to
follow spoken instructions.