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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. Horn car - Wikipedia

   en.wikipedia.org/wiki/Horn_car

   Horn car was a name given to a range of dealer-modified passenger cars, usually Ford Falcons, sold at Australian Ford dealers in the 1970s. The term "horn car" comes from the Horn Car Accessories company which supplied the parts used to modify the cars.

4. Horn loudspeaker - Wikipedia

   en.wikipedia.org/wiki/Horn_loudspeaker

   A horn loudspeaker is a loudspeaker or loudspeaker element which uses an acoustic horn to increase the overall efficiency of the driving element(s). A common form (right) consists of a compression driver which produces sound waves with a small metal diaphragm vibrated by an electromagnet, attached to a horn, a flaring duct to conduct the sound waves to the open air.

5. Nathan Manufacturing - Wikipedia

   en.wikipedia.org/wiki/Nathan_Manufacturing

   This horn is mainly used on Virginia Railway Express cab cars. Nathan also makes P-series and M-series horns for railroads and CS-Series and KJ-series horns, KSV vertical mount horns, steam whistles , heated horn assemblies, electronic pressure regulators, control valves, flange lubricators and glo rod gauges .

6. Horn (acoustic) - Wikipedia

   en.wikipedia.org/wiki/Horn_(acoustic)

   Acoustic horns are used in: horn loudspeakers; brass and woodwind musical instruments; vehicle horns such as those used on cars, trucks, trains, boats, and bicycles; megaphones, often used by lifeguards at public swimming pools. foghorns, used to warn ships; ear horns, used by people who are hard of hearing (the human ear itself having the form ...

7. 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.