File:Reflex loudspeaker animation 2.gif

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File:Reflex loudspeaker animation 2.gif - Wikipedia

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Summary

DescriptionReflex loudspeaker animation 2.gif	English: Animation showing the operation of a reflex loudspeaker. Drawing shows a cross section through the speaker, the construction is cylindrically symmetrical. The reflex or reentrant loudspeaker, also called a megaphone, bullhorn, or loudhailer, is a type of folded horn speaker widely used in public address systems. It consists of a specialized diaphragm loudspeaker called a compression driver (a) attached to a metal or plastic horn (d). The driver has a small metal diaphragm (blue) driven to vibrate by the audio signal current flowing through a coil of wire (red) between the poles of a cylindrical magnet (green). The horn serves to couple the diaphragm more efficiently to the air, allowing it to radiate more of its energy as sound than a conventional horn speaker, making it louder. The horn sound path must be several feet long, so to make the speaker more compact the sound path is "folded" into a zigzag shape by several concentric exponentially-widening ducts. The sound waves pass forward through an inner tube (b) in the central projection in the horn, back through a larger concentric tube (c), then out through the surrounding horn (d). Reentrant loudspeakers can be 10 times as efficient as cone loudspeakers, and so their output can be 10 dB louder when operating from the same amplifier. However their frequency response is very uneven and limited, with a bandwidth of 300-400 Hz to 5 kHz, so they have a distinctive "tinny" sound and are only used for the human voice. In this animation the rate of vibration of the diaphragm and the speed of the sound waves are shown greatly reduced.
Date	2 March 2013, 17:45:33
Source	Own work
Author	Chetvorno
Other versions	This is an improved version of my previous animation Reflex loudspeaker animation.gif. Improvements: Made speaker horn closer to shape of actual bullhorn, showed sound waves radiating from mouth. Increased speed of animation to more realistically represent speaker vibrations. Increased wavelength to more realistically represent actual sound waves in speaker; previous waves were in ultrasonic range.

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I, the copyright holder of this work, hereby publish it under the following license:

	This file is made available under the Creative Commons CC0 1.0 Universal Public Domain Dedication.
	The person who associated a work with this deed has dedicated the work to the public domain by waiving all of their rights to the work worldwide under copyright law, including all related and neighboring rights, to the extent allowed by law. You can copy, modify, distribute and perform the work, even for commercial purposes, all without asking permission. CC0falsefalse

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	Date/Time	Thumbnail	Dimensions	User	Comment
current	01:51, 3 March 2013		392 × 400 (96 KB)	Chetvorno	User created page with UploadWizard

File usage

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Global file usage

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Usage on de.teknopedia.teknokrat.ac.id
- Horn (Lautsprecher)
Usage on es.teknopedia.teknokrat.ac.id
- Megáfono
Usage on fr.teknopedia.teknokrat.ac.id
- Haut-parleur à pavillon
Usage on gl.wikipedia.org
- Megáfono
Usage on it.teknopedia.teknokrat.ac.id
- Altoparlante
Usage on ja.wikipedia.org
- メガホン
Usage on ms.wikipedia.org
- Megafon
Usage on pnb.wikipedia.org
- بھونپو
Usage on pt.teknopedia.teknokrat.ac.id
- Altifalante
Usage on ru.teknopedia.teknokrat.ac.id
- Мегафон
Usage on sr.wikipedia.org
- Мегафон
Usage on sv.wikipedia.org
- Hornhögtalare
- Megafon
Usage on tr.wikipedia.org
- Megafon
Usage on www.wikidata.org
- Q216217
- Q1628295

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GIF file comment	PhotoScape

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