Ads
related to: aqua signal boat horn kit reviews
Search results
Results from the WOW.Com Content Network
Foghorn made with a marine shell, with a hole on its narrowest side An early form of fog signal: the fog bell at Fort Point Light Station, Maine. Audible fog signals have been used in one form or another for hundreds of years, initially simply seashell horns, fog bells or gongs struck manually.
The signal system was of particular importance for safe navigation in fog. Fog signals, horns and whistles, conducted by air were unreliable and erratic. Sonic signals through water were more reliable and had more range. [1] Offshore hazards could be marked by a tripod mounted bell connected to a shore station by cable. [9]
Phase-shift keying (PSK) is a digital modulation scheme that conveys data by changing (modulating) the phase of a reference signal (the carrier wave). The signal is impressed into the magnetic field x,y area by varying the sine and cosine inputs at a precise time. It is widely used for wireless LANs , RFID and Bluetooth communication.
A horn is a sound-making device installed on motor vehicles, trains, boats, and other types of vehicles. The sound it makes usually resembles a “honk” (older vehicles) or a “beep” (modern vehicles). The driver uses the horn to warn others of the vehicle's presence or approach, or to call attention to some hazard.
A patent horn loudspeaker. Loudspeakers are often built into horn-shaped enclosures or use horns. Most often the higher-frequency elements (tweeters and midranges) use horns, sometimes with acoustic diffraction lenses to spread the sound waves in a horizontal pattern at ear-level and limit the vertical pattern. An audio driver (e.g., a speaker ...
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!
Output of a computer model of underwater acoustic propagation in a simplified ocean environment. A seafloor map produced by multibeam sonar. Underwater acoustics (also known as hydroacoustics) is the study of the propagation of sound in water and the interaction of the mechanical waves that constitute sound with the water, its contents and its boundaries.
The blowing horn or winding horn is a sound device that is usually made of or shaped like an animal horn, arranged to blow from a hole in the pointed end of it. This rudimentary device had a variety of functions in many cultures, in most cases reducing its scope to exhibiting, celebratory or group identification purposes ( signal instrument ).
Ads
related to: aqua signal boat horn kit reviews