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The volume displaced by the cone, equal to the cone area multiplied by . A particular value may be achieved in any of several ways. A particular value may be achieved in any of several ways. For instance, by having a small cone with a large X m a x {\displaystyle X_{\rm {max}}} , or a large cone with a small X m a x {\displaystyle X_{\rm {max}}} .
One such is to design a closed-box loudspeaker enclosure, then building a transmission line of the same volume tuned to the closed-box loudspeaker's resonance frequency. Another is to design a bass reflex loudspeaker, again building a transmission line of the same volume, tuned to the frequency of the Helmholtz resonator.
The result is that the coupled driver pair (iso-group) can now produce the same frequency response in half the box volume that a single driver of the same type would require. For example, if a speaker is optimized for performance in a 40 liter enclosure, one iso-group of the same speakers can achieve the same low frequency extension and overall ...
A significant increase in the effective volume of a closed-box loudspeaker can be achieved by a filling of fibrous material, typically fiberglass, bonded acetate fiber (BAF) or long-fiber wool. The effective volume increase can be as much as 40% and is due primarily to a reduction in the speed of sound propagation through the filler material as ...
The output pattern of an industrial loudspeaker shown using spherical polar plots taken at six frequencies. Loudspeaker measurement is the practice of determining the behaviour of loudspeakers by measuring various aspects of performance.
Bass reflex enclosure schematic (cross-section). RCA bass reflex shelf stereo speakers.. A bass reflex system (also known as a ported, vented box or reflex port) is a type of loudspeaker enclosure that uses a port (hole) or vent cut into the cabinet and a section of tubing or pipe affixed to the port.
With the substitution of pressure for voltage, and volume particle velocity for current, the equations are essentially the same. [2] Electrical transmission lines can be used to describe acoustic tubes and ducts, provided the frequency of the waves in the tube is below the critical frequency, such that they are purely planar.
Manufacturers typically provide a spreadsheet or custom program to design arrays. Examples include L-Acoustics SOUNDVISION, [15] Adamson Blueprint, [16] Electro-Voice LAPS (Line Array Prediction Software), [17] d&b audiotechnik ArrayCalc, and JBL Vertec Line Array Calculator. [18] Renkus Heinz offers a program called EaseFocus.