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Stone, concrete, plaster, and even building structures have also been used. Enclosures can have a significant effect beyond what was intended, with panel resonances, diffraction from cabinet edges [6] [7] and standing wave energy from internal reflection/reinforcement modes being among the possible problems. Bothersome resonances can be reduced ...
A defined list of many possible space types within a building the associated watts per square foot allowance. For example, ANSI/ASHRAE/IESNA Standard 90.1-2007 allows the Emergency Space of a hospital to be designed for 2.7 watts per square foot, but the Recovery areas of a hospital would be allowed 0.8 watts per square foot.
It can generate a constant 15 Hz sine wave tone at 140 dB for 24 hours a day, seven days a week with extremely low harmonic distortion. The subwoofer has a flat frequency response from 15 to 80 Hz, and is down 3 dB at 12 Hz. [122] It was built within an intermodal container 20 feet (6.1 m) long and 8 by 8 feet (2.4 m × 2.4 m) square. [123]
Distributed Mode Loudspeaker (DML) is a flat-panel loudspeaker technology, developed by NXT, [1] in which sound is produced by inducing uniformly distributed vibration modes in the panel through a special electro-acoustic exciter.
Specimen has made Horn Speakers in a variety of powers, ranging from 10 or less watt speakers for personal use (such as with an MP3 player) [7] to 70 watt pieces intended for stage performance. Andrew Bird uses a specially-designed Horn Speaker known as the Janus Horn, featuring a two-mouthed horn that spins during operation, giving music ...
The WØ line is expanded to include 8-inch and 15-inch drivers. JL Audio moves its headquarters to a 92,000 square-foot facility in Miramar, FL. In 1999, W3 subwoofers are introduced. The Stealthbox, PowerWedge and Evolution lineups are further expanded with new models and replacements for old models.
A rotary woofer is a subwoofer-style loudspeaker which reproduces very low frequency content by using a conventional speaker voice coil's motion to change the pitch (angle) of the blades of an impeller rotating at a constant speed. The pitch of the fan blades is controlled by the audio signal presented to the voice coil, and is able to swing ...
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