Nevada Sound Research Acoustic Measurement Test Lab
Loudspeakers - Amplifiers - Crossovers - Room Acoustics
"Quality Loudspeaker Testing with Extraordinary Results"
"If it makes a sound or puts out a signal we can test it."
"If it makes a sound or puts out a signal we can test it."
Client Services Provided
What we can do for you -
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.
• Below you will find technical information about the TEF-25 Analyzer and some of its software capabilities, including sample screen shots.
Measurements/Displays
Energy Time Curves (ETC)
Selectable frequency range and sweep time
Selectable number of data sample points (512, 1024, 2048, 4096, 8192)
Selectable measurement windows (Blackman, Hamming, Hanning, Kaiser, Rectangular)
Selectable scaling parameters as fine as one dB per division or auto scale
Data cursor displays absolute or relative amplitude
Frequency and Phase Response Curves
Selectable frequency range, sweep time, frequency resolution, sweep rate and bandwidth
Selectable number of data sample points (512, 1024, 2048, 4096, 8192)
Selectable scaling parameters as fine as one dB per division or auto scale
Data cursor displays absolute or relative amplitude
Noise Criteria Curves (NC)
Uses ANSI* type one filters
Selectable integration time (1 to 9,999 seconds)
RT60
Calculated from ETC data
Reverberation time
Direct/reverberant ratio
Speech Intelligibility-% ALCONS
Calculated from ETC data
Calculated direct/reverberant ratio
Displays Schroeder Integration Curve
Speech Intelligibility-RASTI and STI
Displays data in tabular or graph format
Stores NC and ETC data taken during measurement
Ability to post process with different noise values
3D Waterfall
Select from 2 to 100 curves
Examine data from left or right, forward or reverse view
Nyquist Display
Amplitude and phase information in a polar format
Heyser Spiral
Three dimensional plot of the real and imaginary components of the TEF signal
Averaging mode
Either vector or magnitude averaging of both frequency and time curves
Energy Time Curves (ETC)
Selectable frequency range and sweep time
Selectable number of data sample points (512, 1024, 2048, 4096, 8192)
Selectable measurement windows (Blackman, Hamming, Hanning, Kaiser, Rectangular)
Selectable scaling parameters as fine as one dB per division or auto scale
Data cursor displays absolute or relative amplitude
Frequency and Phase Response Curves
Selectable frequency range, sweep time, frequency resolution, sweep rate and bandwidth
Selectable number of data sample points (512, 1024, 2048, 4096, 8192)
Selectable scaling parameters as fine as one dB per division or auto scale
Data cursor displays absolute or relative amplitude
Noise Criteria Curves (NC)
Uses ANSI* type one filters
Selectable integration time (1 to 9,999 seconds)
RT60
Calculated from ETC data
Reverberation time
Direct/reverberant ratio
Speech Intelligibility-% ALCONS
Calculated from ETC data
Calculated direct/reverberant ratio
Displays Schroeder Integration Curve
Speech Intelligibility-RASTI and STI
Displays data in tabular or graph format
Stores NC and ETC data taken during measurement
Ability to post process with different noise values
3D Waterfall
Select from 2 to 100 curves
Examine data from left or right, forward or reverse view
Nyquist Display
Amplitude and phase information in a polar format
Heyser Spiral
Three dimensional plot of the real and imaginary components of the TEF signal
Averaging mode
Either vector or magnitude averaging of both frequency and time curves
Measurement Type
TDS (Time Domain spectrometry) time and frequency response measurements
Displays
Polar Plot
Measures and displays polar data on ISO standard frequency centers (1, 1/2, 1/3, 1/6, and 1/12 octave)
Beamwidth, Directivity and Q plotted on polar graph against frequency
Selectable mirroring or partial data around 0º and 180º Overlays, all or selected frequencies on single polar plot or tiles individual plots
Selectable frequency measurement range or choose from preset values
Data cursor displays absolute or relative amplitude in dB or reference units
Selectable frequency resolution, sweep rate, bandwidth and number of data sample points (512, 1024, 2048, 4096, 8192)
Energy Time Curves (ETC)
Selectable frequency range and sweep time
Displays time vs magnitude or Heyser Spiral
Selectable number of data sample points (512, 1024, 2048, 4096, 8192)
Data cursor displays absolute or relative amplitude in dB or reference units
Selectable measurement windows (Blackman, Hamming, Hanning, Kaiser, Rectangular)
Selectable scaling parameters as fine as one dB per division or auto scale
Frequency and Phase Response Curves
Selectable frequency range, sweep time, frequency resolution, sweep rate and bandwidth
Data cursor displays absolute or relative amplitude in dB or reference units
Selectable number of data sample points (512, 1024, 2048, 4096, 8192)
Displays include magnitude, phase, Heyser Spiral and Nyquist
Selectable scaling parameters as fine as one dB per division or auto scale
3-D Waterfall
Select from 2 to 100 curves
Examine data from left or right, forward or reverse view
Spherical Display
Display a set of polar measurements as a balloon
TDS (Time Domain spectrometry) time and frequency response measurements
Displays
Polar Plot
Measures and displays polar data on ISO standard frequency centers (1, 1/2, 1/3, 1/6, and 1/12 octave)
Beamwidth, Directivity and Q plotted on polar graph against frequency
Selectable mirroring or partial data around 0º and 180º Overlays, all or selected frequencies on single polar plot or tiles individual plots
Selectable frequency measurement range or choose from preset values
Data cursor displays absolute or relative amplitude in dB or reference units
Selectable frequency resolution, sweep rate, bandwidth and number of data sample points (512, 1024, 2048, 4096, 8192)
Energy Time Curves (ETC)
Selectable frequency range and sweep time
Displays time vs magnitude or Heyser Spiral
Selectable number of data sample points (512, 1024, 2048, 4096, 8192)
Data cursor displays absolute or relative amplitude in dB or reference units
Selectable measurement windows (Blackman, Hamming, Hanning, Kaiser, Rectangular)
Selectable scaling parameters as fine as one dB per division or auto scale
Frequency and Phase Response Curves
Selectable frequency range, sweep time, frequency resolution, sweep rate and bandwidth
Data cursor displays absolute or relative amplitude in dB or reference units
Selectable number of data sample points (512, 1024, 2048, 4096, 8192)
Displays include magnitude, phase, Heyser Spiral and Nyquist
Selectable scaling parameters as fine as one dB per division or auto scale
3-D Waterfall
Select from 2 to 100 curves
Examine data from left or right, forward or reverse view
Spherical Display
Display a set of polar measurements as a balloon
