Please note that SoundCheck™ software is available in various configurations which are optimized for all applications. The capabilities described below are for all possible software options and may not be available in all configurations. Please contact Listen Inc. or your local sales representative for package descriptions and pricing.

Hardware Requirements

• Microsoft ® Windows ® 98 SE, ME, NT, 2000 or XP
• Pentium ® III processor (P4 recommended for optimum speed) or equivalent
• 128 MB of RAM (512 MB or more recommended for large WAV files or high resolution measurements below 50Hz)
• 150MB of available hard-disk space

Recommended Sound Cards and Specifications

(coming soon)

SoundCheck Virtual Audio Test Bench

Manual Signal Generator

• Variable frequency and amplitude sine wave excitation via keyboard or virtual knobs
• Play any selected WAV file at a user-defined level
• Equalize any selected WAV file at a user-defined level

Multimeter

• Real-time monitoring of overall RMS levels (e.g. volts, SPL, ohms, etc.)
• Selectable averaging time
• Max hold
• Selectable Max/Min values with Pass/Fail indication

Oscilloscope

• Waveform peak detection
• Delta cursor
• Selectable zoom

Spectrum Analyzer

• FFT and DFT with any number of lines
• Hanning, Hamming, Blackman-Harris, and Flat top windows
• Max hold
• Selectable averaging time (Linear & Exponential)
• Selectable triggering
• Pure tone frequency and amplitude extraction
• Delta and Harmonic cursor with THD readout
• Power averaging
• Selectable zoom

Real-Time Analyzer

• 1/1, 1/3, 1/6, 1/12, 1/24 octave filters with true digital recursive filters
• A, B, and C weighting filters
• Complies with ANSI S1.11 and IEC 1260
• Max hold
• Exponential and linear time averaging including fast and slow sound level meter response

SoundCheck Step Editors

Hardware

Modify sound cards settings, such as bit depth and sampling rate; select communication mode with peripheral devices including RS-232,GPIB (IEEE-488), DC Connect™ programmable DC power supply and measuring amplifier, and digital I/O cards; no limitation on number of external interfaces used.

Calibration

User-defined units and transducer sensitivities enable SoundCheck to measure any dynamic signal. SoundCheck can be calibrated with external, absolute source including acoustic, vibration, or voltage. SoundCheck will correct for amplitude and phase of input and output devices (e.g. microphones and amplifiers). If the output device is an acoustic source, (e.g. loudspeaker, mouth simulator), SoundCheck can automatically equalize any test signal including complex signals.

Messages

• Message steps initiated based on Pass/Fail conditions
• Display text message in local language, input numeric values, Yes/No dialog
• Digital I/O
• IEEE-488
• RS-232

Stimulus

• Stimuli type include stepped sine sweep (STWEEP™), amplitude sweep, WAV file, DC, and continuous log sweep (used in conjunction with optional Time Selective Response analysis algorithm)
• Stweep step size includes 1/3, 1/6, 1/12, and 1/24 octave; user-defined linear and log

Acquisition

• Play & Record, or any combination of Signal Generator, Multimeter, RTA, and FFT
• Capture response time waveform as a WAV file

Analysis

• Amplitude values in linear units (e.g. volts, Pascals, etc.) or dB
• Envelope of response time waveform
• Impedance curves
• Autodelay to automatically compensate for delay between input and output
• Manually enter delay in milliseconds, centimeters, or inches
• Broadband RMS to measure unfiltered level of an AC or DC signal
• Spectrum calculates the FFT of the response waveform
• Time Selective Response to measure free-field and impulse response of fundamental AND harmonics
• Heterodyne to measure frequency and phase response only
• HarmonicTrak™ Algorithm power sums a range of user-selected harmonics including sub-harmonics; no limit to number of harmonics
• Frequency and phase response including harmonic amplitude and phase
• Classic THD and Rub & Buzz
• Normalized THD and Rub & Buzz distortion (harmonics compared to amplitude of fundamental at measured frequency)
• THD + Noise
• Relative or absolute response
• Loose particle detection

Recall

• Automatically recall data or results

Post-processing

• Addition, subtraction, multiplication, division, offset by constant (X, Y, or Z dimensions), change sign, reciprocal, absolute value, square, square root, exponential, logarithm, average, maximum, minimum, estimated resonance and notch
• Search range to find intersection of two curves (e.g. -3dB points of crossover network)
• Curve smoothing with 1/3, 1/6, 1/12, and 1/24 octave or user-defined linear or log resolution
• Loudness rating according to IEEE and ITU-T; example sequences for TIA and other industry standards included
• Attack & Release time calculates the time for the response signal to rise or decay, respectively, by a user-defined amplitude in dB or linear units
• Equation editor
• Thiele-Small parameters using added mass or added volume
• Any number of equations can be combined
• Variables can be given user-defined descriptive names (e.g. Qms for speaker Q with added mass)

Statistics

Real-time updates of:
• Overall yield
• Yield for an individual test (e.g. sensitivity)
• ± x sigma of any measured curve, result, yield, or calculated value
• Max, min, and mean of any measured curve, result, yield, or calculated value

Limits

• Limits applied to any measured curve, value, or calculated value
• Upper only, lower only, upper and lower
• Limits can be entered manually, recalled from a file, offset a curve or portion of the curve by user-defined amount (e.g. ±3dB), or changed graphically by "dragging" limit points using mouse
• Floating, absolute, align to a point (e.g. 1 kHz aligned to 0 dB), individual points
• X axis can be "floated"

Display

• Multiple displays can be placed on the screen to view curves, single values, and test results with PASS/FAIL indicators; display layout can be transferred to Word or as HTML document; curves
• with different units (e.g. dBSPL and Ohms) can be displayed in one graph with no limit to number of curves displayed in a single graph; data from any one graph can be exported directly to a new
• Excel file or pre-defined template
• Displays include XY graph, table, results, text, polar plots and
• embedded images

Printing

• Automatically print display layout to default printer or HTML