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greg o 08-26-2009 12:36 PM

Find me a testing lab!
Hi Everyone,

I just joined your organization and am looking forward to the threads! To that end, does anyone out there know of an independent laboratory that can verify claimed specifications for speakers ((Frequency response, Amp power, sensitivity, maximum output, cross over points, etc,. )?

Looking forward to the response!

Greg O

Omnipresent Sound R&D Inc 10-01-2009 10:11 PM

Re: Find me a testing lab! Omnipresent Sound R&D Inc. as of Jan 1 2010 will become Omnipresent Sound .com and Nevada Sound Research Acoustic measurement Test Lab will be the main company for all your needs.
Whether you are a loudspeaker manufacturer, audio component designer, or an independent Inventor,
at Nevada Sound Research Acoustic Measurements Lab we are here to provide independent verification of your product.
Auditoriums, concert venues, places of worship and recording studios can also benefit from acoustic testing and acoustic treatment, providing for improved sound distribution to the audience or recording device. Loudspeakers, crossover components, amplifiers, EQ's or other electronic devices, room acoustics/treatments -
Nevada Sound Research can it do with accuracy, dependability and with a promise to meet or exceed your goals.

How we do what we do and why -
In today's world of sound reproduction, it is not enough to just test the loudspeaker; you need to have the accuracy of acoustic test measurements with graphics. Factors taking the analysis to completion must include the variables of time, energy and frequency, as well as temperatures, along with other conditions. Most important is that the loudspeaker under test be repeatable not two or three times but many times over until each sweep test has been overlaid and appears as one sweep in general. Complex data is run in a difference mode to confirm its data of the TDS.
A critical factor that is often overlooked by other test services is a series of tests to determine how accurate speech intelligibility is for the loudspeaker under test. Speech intelligibility is a measure of sound clarity that indicates the ease of understanding speech through the loudspeaker; in short know as STI or Speech Transmission Index. This is accomplished by seven single one-second time-span ETC;s, one at each of seven octave center frequencies between 125 Hz and 8 kHz. After each ETC modulation transfer function (MTF) is calculated, STI in each octave band is computed. Please remember this is just a short version of some of our capabilities.

What we can do for you "If it makes a sound or puts out a signal we can test it"

We have a fully equipped loudspeaker test facility, with speaker system design and development capabilities. We can perform the following; acoustic measurement performance, documentation of loudspeaker systems including complex data, acoustic measurements for raw drivers, component testing evaluations with recommendations for your product when requested. We provide services to substantiate claims for clients when the accuracy of acoustic test measurements and graphics are needed. The page below gives a more detailed description of types of services we offer.

What We Offer :

Competitive product analysis reports including complex data and graphics, with five complete printed copies.
Fees are based on type of measurement analysis report required, as they can vary any where from a
general five page report including graphics, to a full complex data report exceeding twenty pages.

• Comprehensive 'Complex Data Reports' with full graphics.

• A mutual confidentiality agreement for protection to our clients.

• Electronic measurements of crossovers, equalizers and passive filters.

• Impedance measurements both at nominal levels, and at high power.

• Measurements of loudspeakers, complete systems and raw drivers.

• Speaker power handling tests - RMS (destructive and non-destructive)

• Room acoustic analysis measurements - RT/60, STI and RASTI - for both studios and auditorium/concert halls

• Primary testing is performed using TEF-25 Analyzer with Sound Labs Software. ETC, TDS, PLR, RTA, MLS, PET, FFT, STI / RASTI

•True RTA, WT 3# Sonic Beacon, Spectrum Analyzer and other programs are used to gather general information before primary testing is performed.

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