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2. Vehicle horn - Wikipedia

   en.wikipedia.org/wiki/Vehicle_horn

   Again, these horns can be either single, or arranged in pairs; typical frequencies for a pair are 420–440 Hz and 340–370 Hz (approximately G ♯ 4 –A 4 and F 4 –F ♯ 4) for this design. Diagram showing how a car horn works. A horn grille is a part of some designs of car or other motor vehicle that has an electric horn, such as a motor ...

3. Q2B - Wikipedia

   en.wikipedia.org/wiki/Q2B

   The Q-siren produces 123 decibels at 10 feet (3.0 m) with an operating current of 100 amps at 12 V DC (1.2 kW). [1] Hearing protection is recommended but not required when operating the siren or for anyone in the truck. The Q2B is mounted outside the truck, usually in the front bumper, on top of an extended front bumper or on the grill.

4. Boilermaker Special - Wikipedia

   en.wikipedia.org/wiki/Boilermaker_Special

   It featured a standard automotive 12-volt marker bulb reflected by a large parabolic mirror. It was so bright it could only be used during parades. A locomotive air horn was installed on the top left side of the cab. When the horn was sounded, the Boilermaker Special III could be heard from miles away.

5. Car alarm - Wikipedia

   en.wikipedia.org/wiki/Car_alarm

   Frequently, false alarms occur because car alarm owners use high sensitivity settings. This may be the main reason why loud bass frequency sound (loud music, other cars or motorcycles with loud exhaust systems, thunderstorms, etc.) can set off car alarms. The second possible reason is that some parts of the alarm system may be improperly installed.

6. AOL Mail

   mail.aol.com

   Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

7. Video shows frightening moment truck loses load of lumber ...

   www.aol.com/video-shows-frightening-moment-truck...

   In a dashcam video captured in Harrisburg, Pennsylvania on Tuesday, one driver experienced a thankfully not deadly, but still frightening ordeal when a load of construction materials fell from a ...