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Junior Varsity
Help me understand the concept of speaker “throw” please.
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<blockquote data-quote="Art Welter" data-source="post: 130490" data-attributes="member: 52"><p>Re: Help me understand the concept of speaker “throw” please.</p><p></p><p></p><p>1) As explained, an out of date term.</p><p>2) A 90 degree or wider horn was considered "short throw" 60 degree or more narrow was considered "long throw". If you compare two horns of the same "family" the SPL on axis of a 60 x 45 will be 3 dB more sensitive (louder) than a 90 x 45.</p><p>3) Narrower or more coherent wave propagation and higher initial SPL help at distance.</p><p>4) High frequency air absorption reduces all types of devices output at distance.</p><p>5) The use of parabolic or hyperbolic devices can cut the usual 6 dB per doubling of distance to 3 dB per doubling of distance, which can cut the amount of drivers and power needed for a given SPL at a long distance by a huge margin.</p><p><a href="http://soundforums.net/varsity/7268-hyperboline-%99-new-player-old-game.html" target="_blank">http://soundforums.net/varsity/7268-hyperboline-%99-new-player-old-game.html</a></p><p>6) HF air absorption is worst at hot temperatures with dry air, so keeping an environment cool and relatively humid can be a huge improvement. Wind and temperature gradients make sound propagation difficult, so windbreaks and shade covers can be helpful outdoors.</p></blockquote><p></p>
[QUOTE="Art Welter, post: 130490, member: 52"] Re: Help me understand the concept of speaker “throw” please. 1) As explained, an out of date term. 2) A 90 degree or wider horn was considered "short throw" 60 degree or more narrow was considered "long throw". If you compare two horns of the same "family" the SPL on axis of a 60 x 45 will be 3 dB more sensitive (louder) than a 90 x 45. 3) Narrower or more coherent wave propagation and higher initial SPL help at distance. 4) High frequency air absorption reduces all types of devices output at distance. 5) The use of parabolic or hyperbolic devices can cut the usual 6 dB per doubling of distance to 3 dB per doubling of distance, which can cut the amount of drivers and power needed for a given SPL at a long distance by a huge margin. [url]http://soundforums.net/varsity/7268-hyperboline-%99-new-player-old-game.html[/url] 6) HF air absorption is worst at hot temperatures with dry air, so keeping an environment cool and relatively humid can be a huge improvement. Wind and temperature gradients make sound propagation difficult, so windbreaks and shade covers can be helpful outdoors. [/QUOTE]
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Help me understand the concept of speaker “throw” please.
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