Tue Jul 03, 2007 1:35 am
Hi, all. Perhaps I can offer some insight into this discussion. The drivers used in Whelen sirens have a significantly higher compression ratio than a typical high-frequency, mid-frequency, or paging compression driver. This compression ratio is so high, in fact, that at full power the throat of the horn is actually overloaded, generating up to 10% THD. So, that's why voice and audio from siren drivers usually doesn't sound so great. The important thing is to be loud, though, which the Whelen siren drivers accomplish better than any other siren driver out there. The Whelen drivers also have a significantly larger diaphragm than any other siren driver (with the exception of the Community M4, which is used in some outdoor voice paging systems).
Say NO to excessive siren testing - overtesting desensitizes the public.
Say NO to voice siren systems - multiple origins = unintelligible audio.