Submitted by relationship-nerd t3_y32712 in boston
cuttlefishwasright t1_is6944b wrote
Is it a police vehicle rumbler being turning on for a brief second?
zeydey t1_is6fpgz wrote
Might be. I know Braintree Police have these really loud and bassy sonic boom type things, you can feel it pulse your car as they drive by. Wild tech.
frankybling t1_is6iers wrote
they use them for hearing impaired people, but they also work for people who have their car stereos up too loud to hear normal sirens (but the origins purpose was for the hearing impaired)
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