Acoustic/Audio Analysis Software
The combination of Hypersignal®-Acoustic software allows a wide range of
acoustic/audio analysis functions, displays, and instruments.
Functions
MLS stimulus & response; up to 3 sec impulse response measurement at 44.1 kHz
arbitrary stimulus and response using user-defined stimulus waveforms
Equalization from measured input or from waveform file input (including SYSid
or TEF20 ASCII input files)
Distortion measurement
Very Long FFT and Convolution (up to 131,072 pts.)
minimum phase calculation from arbitrary impulse response
Schroeder integration and RTnn estimation
user-defined types of stimulus & response (simultaneous record/playback)
Difference equations, with standard nomenclature
digital filter design and implementation, including both classical and arbitrary FIR and IIR filter types
.WAV file or .TIM file input in all functions
Waveform Display
256-color contour display (2-D spectrograph)
reverse-time waterfall display
magnitude and unwrapped phase display
Log/linear amplitude time domain display, with cut-paste and rubberband (point-mode)
editing
Instruments
Real-time spectrum analyzer, with 1/N octave band display, transfer function measurement,
impulse response measurement, dual-trace or overlaid comparison with captured waveform file,
real-time digital filtering (see
Hypersignal-Macro software description for more information)
Continuous D/A output signal generator with pre-defined sine-, square-, triangle-,
and pulse-waveform types, plus arbitrary waveform output
Continuous disk record at 11.025, 22.05, and 44.1 kHz, one- or two-channel "snap-in"
real-time filter option
Continuous disk playback, real-time filter option
Strip-Chart recorder
Digital Tape recorder
Example Hardware Options
low-cost (USD 349) Sig56-2 board with 92 dB typical 2-channel
analog I/O, 40 MHz DSP56001, and 32k x 24 3-wait SRAM
National Instruments AT-DSP2200 board, with 2-channel sigma-delta analog I/O, 92 dB typical,
384k x 32 zero-wait SRAM
8-chan input, 8-chan output sigma-delta Sig32C-8 board
with 82 dB typical dynamic range, 80 MHz DSP32C, 128k x 32 zero-wait SRAM, expansion 512k x 32
3-wait SRAM, interboard sampling, and interboard communication bus
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