Sennheiser MEB 114 Instruction Manual SpeechLine Wired - Page 7

Sennheiser SpeechLine - True to the word MEB 102 MEB 104 MEB 102-L MEB 104-L Pick-up patterns of the microphones Omni-directional pick-up pattern An omni-directional pattern picks up the sound uniformly from all directions. Cardioid pick-up pattern A cardioid pattern has a wide directional characteristic, i.e. a wide opening angle. Sound hitting the rear of the microphone is attenuated very strongly. ME 34 MEG 14-40 MEG 14-40-L ME 35 ME 36 Super-cardioid pick-up pattern A super-cardioid pattern has a slightly stronger directional characteristic than the cardioid pattern, so it suppresses noise coming from the side even more strongly but also picks up some of the sound coming from the rear. Super-cardioid | lobar pick-up pattern A super-cardioid or lobar pattern has the strongest directional characteristic, i.e. it provides the maximum suppression of sound coming from the side, but it also picks up sound coming from the rear. However, the ratio is lower than it is with the super-cardioid pattern. Positioning the microphones A) Distance from the speaker Basically, the nearer a speaker is to the microphone, the higher the speech intelligibility. For this reason, gooseneck microphones are optimal from an acoustic point of view. They position the microphone capsule close to the speaker while offering excellent orientation. Boundary layer microphones do not achieve the excellent acoustic characteristics of gooseneck microphones, but they can be positioned especially unobtrusively. These microphones can be integrated into any room due to their small size and the colors they are available in. As a result of the so-called boundary layer effect, the signal picked up by the microphone capsule is amplified on a surface (for example a table or a ceiling panel). In this way, part of the distance to the speaker can be compensated for again. B) One microphone for each speaker In the ideal case, a dedicated microphone is used for each speaker. This allows the best possible orientation and distance to the speaker to be ensured at all times. It is also possible to choose a narrower directional characteristic. This allows noise coming from the side as well as acoustic reflections to be minimized, resulting in the highest speech intelligibility. C) "Shared microphones" - several speakers share one microphone One microphone per speaker is ideal, but one microphone shared by two speakers is often adequate for many applications. A microphone with a sufficiently wide opening angle should be selected here. The microphone can thus pick up both speakers if installed centrally before them. 6 | SpeechLine IS microphone series