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horn calculations
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<blockquote data-quote="pwnt by pat" data-source="post: 1050917" data-attributes="member: 556604"><p>Throat area:</p><p></p><p>At=(2(pi)*Fs*Qts*Vas)/c</p><p></p><p>At is the area of the throat (m2)</p><p></p><p>FS is the nominal air resonance of the driver</p><p></p><p>QTS is the total Q of the driver (note, some formulas use QES, the electrical Q here - Bruce Edgar for one)</p><p></p><p>VAS is the equivalent volume suspension (m3)</p><p></p><p>c is the speed of sound (344 m/s)</p><p></p><p>Compression chamber:</p><p></p><p>Vb=Vas/Fc/(Fs*Qts)</p><p></p><p>VB is the back volume (volume of compression chamber next to horn throat, the front chamber in the diagram on the previous page)</p><p></p><p>Vas, Fs, and Qts are standard driver parameters</p><p></p><p>Fc is the lower cutoff frequency of the horn flare (I think)</p></blockquote><p></p>
[QUOTE="pwnt by pat, post: 1050917, member: 556604"] Throat area: At=(2(pi)*Fs*Qts*Vas)/c At is the area of the throat (m2) FS is the nominal air resonance of the driver QTS is the total Q of the driver (note, some formulas use QES, the electrical Q here - Bruce Edgar for one) VAS is the equivalent volume suspension (m3) c is the speed of sound (344 m/s) Compression chamber: Vb=Vas/Fc/(Fs*Qts) VB is the back volume (volume of compression chamber next to horn throat, the front chamber in the diagram on the previous page) Vas, Fs, and Qts are standard driver parameters Fc is the lower cutoff frequency of the horn flare (I think) [/QUOTE]
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