^SynOhrMultiSenseKNX-Eng-13.odt, 2014-05-06 Page 7 of 49
Placement
The max. range of speech recognition is 7 m at normal volume. The range is specified in
SynOhrStudio via the parameter slider (see page 36). Increased range means that under certain
circumstances also a reduced quality of the speech recognition e.g. if additonal noise sources
are close to the SynOhr MultiSense KNX and the speaker is a few meters away. For larger living
rooms we therefore recommend the master-slave operation with multiple stations which are set
to a standard range of about 4 m. The ideal placement is between 1.1 m and 1.5 m in height, so
that radios and televisions etc. are as far away from SynOhr MultiSense KNX but close to the
„normal“ location of the speaker.
1
2
3
Picture 3: Placement Examples
Picture 3 shows examples of placement for SynOhr MultiSense KNX. Place 1 is optimal from the
perspective of speech recognition. Assuming that the TV emits sounds directly and not via
sound system, is at No. 1 the distance to the most probable location of the users (sofa) the
lowest. If there is no possibility behind the sofa place 2 should be preferred instead of place 3,
because at the door are presumed noises or speaking people.
The max. range depends on room acoustics, the place of installation (e.g. acoustic shadow
behind the wall), the speaker volume, and (to a lesser extent on) the number of used words. Up
to a distance of 4 m it is possible under difficult conditions to have a every day suitable
parameterization. In addition the similarity of the selected commands and the room acoustics
plays a large role in theses distances. If noise sources (radio) on SynOhr are louder and closer
than the speaker, a detection is not possible. If larger areas in an open building are acoustically
to be „listened“ you need more slaves.
The parameter „Sensitivity“ in SynOhrStudio (comp. p. 36) sets the range. Because in hallways
or in tiled rooms and without wallpapers resonances or hall are present, you have to work with
smaller „room size“ as in rooms with sound-absorbing elements (wood walls, wallpaper,
carpets).
Recommendation: In difficult conditions – do not change any other parameters – but choose the
range small in order to gradually bring this to the desired sensitivity. It the sensitivity is set too
high the key word recognition reacts on wrong words or is not responding robust.
Enertex
®
Bayern GmbH – Ebermannstädter Straße 8 - 91301 Forchheim - [email protected]
