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RE: Horns and high efficiency . what effect ?

This is a confusing area, yes TTS (temporary threshold shift) does take some time to work (particular muscles in ones ear clamp down) however an interesting paradox exists.
A paradox dealing with an aspect of loudspeaker system performance not measured or discussed often.
Lets say you had a stadium and you had to comply with new laws that require sound systems to be intelligible when used for emergency announcements. To pass the intelligibility test they use a language independent test called STIpa.
If one compares an array such as are usually for concert sound or as often installed in a large venue one finds that the myriad of individual sources and individual arrivals in time from each after a single input event produce low intelligibility compared to a system which only has one arrival in time when fed a single event. As the distance from each source to each listener is a variable, a dsp correction for this is only applicable in one location.

While that measure indicates being faithful to the time information is among the things important for intelligibility, a different thing is found with music when switching from the array to a single source, to reach the same satisfying subjective volume, requires about -10dB lower actual average level or more.
There are inherent reasons those arrays sound like they do and not hifi.


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  • RE: Horns and high efficiency . what effect ? - tomservo 14:04:45 04/08/17 (0)

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