[quote name='AWS0019' timestamp='1324253889' post='467771']
was in dorcester tonight, saw one of the new international / Braun. heard different siren, are they using new frequency siren, more a vibration siren
[/quote]
First two are on the road at A7 in Eastie and A6 in Southie. You probably heard the [url="http://www.swps.com/whelen-howler.html?gclid=CL2opdjBja0CFUTc4Aodvz0FlQ"]"Howler"[/url], which is a low frequency generating attachment for the siren designed to be felt inside the more soundproof vehicles.
was in dorcester tonight, saw one of the new international / Braun. heard different siren, are they using new frequency siren, more a vibration siren
[/quote]
First two are on the road at A7 in Eastie and A6 in Southie. You probably heard the [url="http://www.swps.com/whelen-howler.html?gclid=CL2opdjBja0CFUTc4Aodvz0FlQ"]"Howler"[/url], which is a low frequency generating attachment for the siren designed to be felt inside the more soundproof vehicles.