Facotry installed car alarms
for a school project (Mechanical Engineer) I am researching the frequency ranges that will trigger an automotive alarm. I have tried calling the big 3 manufacturers looking for either the manufacturer of the alarms or any data from testing with no luck. I have also run into the same problem with Directed Electronics (makers of about 6 different alarm systems).
Would anyone here be able to provide me with a phone number or a name or something so that I can obtain this information?