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Junior Varsity
Help me understand the concept of speaker “throw” please.
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<blockquote data-quote="andrew gissing" data-source="post: 131089" data-attributes="member: 75"><p>Re: Help me understand the concept of speaker “throw” please.</p><p></p><p>I've got an analogy i've been thinking of and would like to check and see if it works. Would a balloon work ? As in.. a certain amount of energy is going to come out of the drivers/compression drivers. So this is like blowing up a balloon and then stopping. The flare or box design then acts to modify the ballon. If you squish down on the top of the balloon it will spread sideways and front/back. So this is a bit like a narrow vertical dispersion flare. If you then constrict the sideways part (horizontal dispersion) then this gives the balloon nowhere to go but forward - assuming it cant go back for the sake of this analogy. </p><p></p><p>Ie a narrow vertical and possibly narrow horizontal gives greater forward output because that's what the balloon has been squished to. Same energy (balloon has same volume of air) but more concentrated.</p><p></p><p>And to further the balloon thought.. SPL decreases over distance because of friction in air and, in effect the balloon gets bigger as it spreads out however, the amount of energy it has is still the same but now spread out over a larger area. Kind of like drawing a square on a balloon which is 1/2 full; and then blowing more air into balloon. The amount of energy in the square remains the same but the square is now bigger so the energy is dispersed more. This is where the air in the balloon does not represent the energy but the balloon skin represents the wavefront.</p><p></p><p>Clear as mud ? Do these analogies work - shaping the sound and decreasing volume over distance ?</p><p></p><p></p><p>Andrew</p></blockquote><p></p>
[QUOTE="andrew gissing, post: 131089, member: 75"] Re: Help me understand the concept of speaker “throw” please. I've got an analogy i've been thinking of and would like to check and see if it works. Would a balloon work ? As in.. a certain amount of energy is going to come out of the drivers/compression drivers. So this is like blowing up a balloon and then stopping. The flare or box design then acts to modify the ballon. If you squish down on the top of the balloon it will spread sideways and front/back. So this is a bit like a narrow vertical dispersion flare. If you then constrict the sideways part (horizontal dispersion) then this gives the balloon nowhere to go but forward - assuming it cant go back for the sake of this analogy. Ie a narrow vertical and possibly narrow horizontal gives greater forward output because that's what the balloon has been squished to. Same energy (balloon has same volume of air) but more concentrated. And to further the balloon thought.. SPL decreases over distance because of friction in air and, in effect the balloon gets bigger as it spreads out however, the amount of energy it has is still the same but now spread out over a larger area. Kind of like drawing a square on a balloon which is 1/2 full; and then blowing more air into balloon. The amount of energy in the square remains the same but the square is now bigger so the energy is dispersed more. This is where the air in the balloon does not represent the energy but the balloon skin represents the wavefront. Clear as mud ? Do these analogies work - shaping the sound and decreasing volume over distance ? Andrew [/QUOTE]
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Help me understand the concept of speaker “throw” please.
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