Reverberation
persistence of sound. Also known as: Reverb
See Also: Sound, Ultrasound, Audio, Infrasound, Acoustic, Reverb
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Reverberation Chambers
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Reverberant Test Chambers for sound power level determination and building acoustics measurements
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Medium-size Reverberation Chamber
E-Series
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The E medium-size multicavity Reverberation Chamber Series represents that state-of-the-art in reverberation chamber technology. The E-Series can make single measurements, batch tests, protocols or campaign tests for different frequency bands, different technologies and different channel models, running overnight without human intervention.
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Reverberation Chambers
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Over the past several decades, RCs have been enjoying growing popularity as a promising facility for the characterization of wireless devices and for EMC testing. The RC (Reverberation Chamber) measurement method exhibits much competitive superiority over the AC (Anechoic Chamber) method and TEM Cell method, such as low cost, enhanced test repeatability, a more realistic test environment, and easily achieved high-field environment. The application of the RC for performing EMC testing was first proposed by H. A. Mendes in 1968. In the recent IEC 61000-4-21 standard, the importance of EMC testing using RCs as an alternative measurement technique has been recognized.
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Handheld Audio Analyzer
PAA3X
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The PAA3X is a highly accurate handheld audio analyzer that gives sound engineers a rich array of sound analysis tools. The system features both 61-band and 31-band real time spectrum analysis, RT60 reverb time measurement, SPL and line meter, internal signal generator, EQ setting program, microphone calibration and speaker phase checking abilities. All functions and menus can be accessed through a central jog dial, leaving your other hand free to adjust audio settings. The large color LCD screen has an adjustable brightness to help you see in a dark or well-lit environments alike. The PAA3X also features a "screen capture" function allowing users to save images of the screen to an SD card in BMP format for later reference. The detachable precision microphone can be placed remotely via the included 5-meter extension cable, offering flexible on-site operation management. With all this plus a built-in rechargeable lithium-ion battery, the PAA3X is a must-have multifunctional tool for all serious audio engineers.
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Acoustic Control System
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m+p VibControl performs acoustic testing in reverberation chambers and direct field environments as well as progressive wave tube testing. It is a fully automatic digital control system, providing fast, accurate and repeatable control of high-level noise to a reference octave band spectrum and the overall sound pressure level (OASPL). The control guarantees a high level of product safety.
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A Global Standard for Acoustic Absorption Measurements
Alpha Cabin
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The Alpha Cabin has been especially designed for the measurement of acoustic absorption properties of materials and components used for the noise insulation of vehicles. The Alpha Cabin is significantly smaller than normal reverberation rooms and therefore ideally suited to use within limited space capacities. The acoustic absorption of the Alpha Cabin itself is also very low: Thanks to the high level of sound insulation, background noise in the frequency range of interest is kept to a minimum.
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Acoustic Control
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Acoustic Control provides accurate control for high-level noise testing of reverberant chambers or progressive wave tubes. Based on the Spider hardware platform, Acoustic Control achieves quick and reliable control of the noise level to the reference octave spectrum and the overall sound pressure level (OASPL). Included safety features guarantee the safety of the unit under test.
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Acoustic Image System
Libra
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Lose the basic burlap and foam. Libra panels blend effective sound absorption with striking visual aesthetics to balance reverberations—and keep the focus on the conversation. Select from four sizes up to 14 feet wide, or customize dimensions; hang wall panels or suspend panels from ceilings and trusses.
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Omnidirectional Source
BAS001
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The BAS001 Source is designed to generate omnidirectional sound fields for making standard compliant measurements including: reverberation time (ISO 3382, ASTM E2235), building acoustics (insertion loss, acoustic absorption area, etc: ISO 140-4 ISO 140-3, ASTM E336, ASTM E90, DIN 55 210). The BAS001 is typically used to saturate a room with a uniform acoustic field. The available high-efficiency power amplifier has no fan for cooling, allowing measurements in quiet environments, like those in reverberation time applications.
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Reverberation Tent
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This product is a chamber made of metal flexible fabric tent assembled as a cavity that provides a periodic electro-magnetic environment randomly polarized, spatially uniform, and isotropic.
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Impulsive Sound Source
BAS006
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The BAS006 is an innovative device used to create impulsive noise that includes low frequency energy and avoids problems like secondary bounce. These characteristics make it a great choice for quickly measuring reverberation time when the complexity and weight of a speaker and amplifier is not needed.
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Room Acoustics Analysis on iOS
RoomScope
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RoomScope turns your iPad, iPhone, or iPod touch into a room acoustics measurement and analysis tool. With RoomScope, you can measure a room impulse response and then calculate reverberation time, early decay time, clarity, and definition, as defined in the ISO 3382 standard. RoomScope also allows you to adjust the Schroeder decay curve integration limits with the touch of your finger and plot the calculated room parameters versus whole or 1/3-octave band center frequency.
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Large-size Hybrid Reverberation / Anechoic Chamber
F-Series
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The F large-size hybrid Reverberation/Anechoic Chamber represents the most versatile OTA test system in the market today. With the same unique test features of their E Series RC counterparts, the F-Series can also test large form-factor devices under test (DUTs) like laptops, large TV sets, solar and trash compactors, drones, fridges or washing and vending machines, among others.
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CAD Tool
Sabin
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Sabin is a powerful CAD tool for room acoustics engineers. Based on statistical calculations, it determines the acoustical parameters of a user defined room, such as the reverberation time T60, the sound pressure level, and the RASTI as a measure of speech intelligibility. These parameters are updated dynamically, while the user is changing simulated sound sources and absorbing materials.
