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<p></p> <p><b>New page</b></p><div>{{Unreferenced|date=December 2009}}<br /> [[Image:AcousticHomingDiagram.svg|right|thumb|150px|An illustration of steering based on sound volume]]<br /> &#039;&#039;&#039;Acoustic homing&#039;&#039;&#039; is a system which uses the [[acoustic signature]] ([[sound]]) of a target to guide a moving object, such as a [[torpedo]]. Acoustic homing can be either Passive or Active in nature. <br /> Using Passive, the system is designed to move either toward or away from a sound, and may also be designed to move only toward certain types of sounds to the exclusion of others, while Active is a true [[Sonar]]. The system emits a sound pulse that reflects off objects and then back to the system, where the system processes the echos to determine the proper response.<br /> <br /> ==Method==<br /> An object can be equipped with two or more acoustic [[transducers]], which function as [[loudspeaker|speakers]] and [[microphones]]. If a transducer receives a sound louder than that received by the other transducer, the object turns in the transducer&#039;s direction. If the object is to manoeuvre in three-dimensional space, more than two transducers are needed. Typically, more than three transducers are used, and arrays of over 100 are not unknown. A large number of transducers allows for more accurate steering.<br /> <br /> ==Uses==<br /> {{Main article|Acoustic torpedo}}<br /> Acoustic homing is useful in [[weapons]], specifically acoustic torpedoes. Torpedoes can be made to move toward ships using acoustic homing.<br /> [[File:Torpedos axb01.jpg|thumb|Multiple German [[G7e torpedo|G7e torpedoes]] that use Acoustic Homing|alt=A German G7e Torpedo using Acoustic Homing.jpg]]<br /> <br /> ==See also==<br /> *[[Acoustic quieting]]<br /> *[[Guidance system]]<br /> *[[Acoustic torpedo]]<br /> <br /> {{DEFAULTSORT:Acoustic Homing}}<br /> [[Category:Torpedoes| ]]<br /> [[Category:Weapon guidance]]<br /> <br /> <br /> {{Weapon-stub}}</div>

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