Name: CLIO 3.1
Computer : MS-DOS
Disiributor: Audiomatica S. R. L.
Agent: ORCA Design and Manufacturing Corp.
W. A. R. Audio (Australia)
Price: US$1595
Description: CLIO works as a precision 16-bit sigma-delta A/D and D/A
audio analyzer, and is capable of generating any pre-defined stimuli such as sine, square
wave, bursts, noise, and MLS (Maximum-Length Sequence). It is capable of measuring signals
in both the time and frequency domains, and has a wide range of programmable output
attenuations and input gains. The CLIO board is a half-length PC card that can be directly
connected to a microphone or a separate (optional) battery powered preampl ifier, which
can perform A-weighting filtering or drive long cables. CL10 performs real measurements of
acoustic phase, with the facility to zero the received signal' s group delay. CLIO
executes steadystate sinusoidal analysis with digital filtering of the input signal to
achieve high noise immunity. CLIO is capable of measuring/performing: FFT of input signal
with THD analyzer, THD with burst signals, electrical and acoustical phase, anechoic
transfer function, MLS analysis of linear systems, system impulse response, energy time
curve (ETC), cumulative spectra decay(waterfall plot) ) sinusoidal steady-state transfer
function, near-field response, impedance function, loudspeaker Thiele-Small parameters,
real time 1/3 octave analysis, generation of predefined waveforms, time signal display
(oscilloscope), measurement of inductance and capacitance values, amplitude measurements
in SPL, dBV, dBm. and volts. The results of each measurement can be saved in a file and
can be recalled for subsequent analysis. overlaid plots are also available. Measurement
files can be exported to loudspeaker CAD programs such as CALSOD and LEAP. Audiomatica has
both an email address and a Web page (see their address details for full information).
Name: DAAS 3L
Computer : MSDOS
Distributor: ADM Engineering
Agent: old Colony
Price: US$995
Description: The DAAS 3L consists of a 16-bit card, associated
software, calibrated microphone and documentat ion. St imul i include: sine wave, tone
burst, pink noise, MLS, white noise, periodic noise, and chirp. It uses a 16-bit A/D and
D/A converter, with sampling rates of 48kHz and 6kHz, 16384 maximum sample length, and FFT
lengths from 512 to 4096 points. Frequency range: 15-20000Hz high, 5-2000Hz low, maximum
frequency resolution 0. SHz. Measurement facil ities include: frequency response, phase
response, group delay, harmonic distortion, intermodulat ion distortion, TIM distortion,
impedance response, Thiele-Smal1 parameters, inductance and capacitance, oscilloscope
function, energy time curves, smoothing, and waterfall spectrum plots. Input/output: lx
line out, lx line in, lx mic.
Name:
DSA 11 -
Digital System Analyzer 11
Computer : MS-DOS
Distributor: ADM Engineering
Ageni: 0ld Colony
Price: US$7995
Description: The big brother to DAAS3L, DSA 11 is made up of a
converter PCB, associated software, front-end hardware in a rack mount chassis, and
illustrated manual. Measurement functions and features: signal conditioning and measuring
by 16-bit D/A and A/D converters, transfer function and impedance response, calculation of
phase response with automatic correction of signal propagation time, group - delay, step
response and waterfall plots, distortion measurement as a function of frequency,
distortion measurement with external signals, IM, TIM/DIM, and difference frequency
distort ion measurements, maximum frequency resolution 0.5Hz, export files for use in
speaker CAD programs.
Name: Liberty Aids
Software
Computer: MSDOS
Price: US$2 0
DiSiribuior: old Colonv S0und Lab
Programmer: G. R. Koonce
Description: These programs and files work with IMP and Audiosuite
audio measurement systems. IMPSPACE designs anechoic test layouts. IMPR00M designs near
field and far field test layouts. IMPZOBEL designs simple and comple& Zobels based on
input ZMA files. IMPPCOEO (Passive Crossover and Equalizer) places a fourbranch network
ahead of the system defined by FRD and ZMA files. IMPEOLZR designs downslope equal izer
functions used with. FRD files. Three datafiles are supplied for use with
IMPSPACE.
Name:
Liberty
Audiosuite (software)
Computer : MSDOS
Distributor: Liberty instruments inc
Agent: old colony Sound Lab, Marton Music
Designer: Bill Waslo
Price: US$269 Audiosuite software with printed user' s manual.(a US$30
discount is available for IMP/M owners.)
US$69 Mic/Probe Preamp Kit, including case.
US$99 Assembled Mic/Probe Preamp Kit.
US$13 Highimpedance Test Probes Assembled.
US$23 Calibrated Mic Caosule and Leads.
US$129 Housed microphone capsule, calibrated, with holde (for use with
IMP or the Mic/Probe Preamp).
US$179 Echo/DSP Sound Card, modified for better low-frequency response,
with bundled software (Soundlmpress ions and drivers) .
Description: The Liberty Audiosuite is a component test system capable
of measuring frequency/transient response, impedance, distortion, and spectral energy.
Features include dual chpnnel MLS testing, cepstral analys is, gated s inewave testing for
high dynamic range results at user chosen frequency points, steady state sinewave testing
including measurement of harmonic distortion components as low as 0.03% with distortion
versus frequency plotting, high purity multiprecision programmable signal generator,
impedance measuretuents al low analys is of electronic components and automatic
determination of loudspeaker Thiele-Small parameters, energy versus time displays for
acoustical analysis of rooms and speakers, dual channel oscilloscope function with
moveable markers, waterfal1 plots of cumulative spectral decay for resonance
investigations, powerful data conversion faci 1 ities provide convers ion between
FFT-derived data (constant frequency increments) and log frequency fortuat spacing or map
data to user-defined frequency 1ists; programmable automatic operations for efficient
research testing or cost effective production testing, choice of 13 sample rates up to
from 5.5kHz to 48kHz with digital/analog anti-aliasing filtering, acquisition sizes of up
to 16383 points, ASCll data export for compatibility with popular design and simulation
packages, 2-channel 16-bit data acquisition with software controlled input/output gains,
easy operation with on-line help, 1/l-octave to 1/12-octave band smoothing of measured
frequency responses. The Liberty Audiosuite uses a versatile and powerful, yet
inexpensive, DSPbased Personal Sound Architecture soundcard designed by Analog Devices and
Echo Speech Corporation based around the ADSP2115 DSP processor. These boards include the
orchid SoundWave 32 and GameWave 32 Plus, the Cardinal Digital Sound Pro 16, the Wearnes
Beethoven, the Paradise DSP16, and the Echo soundcard. These boards generally also provide
standard compatible multimedia sound and synthesis functions. A testing microphone needs
to be purchased separately. The IMP microphone (plans available for builders) or the Mitey
Mike could be used.
Name:
LMS
(Loudspeaker Measurement System)
Computer : MS-DOS .
Distributor: LinearX Systems inc
Agent: ME Technologies, Munro Associates, and many others.
Programmer: Chris Strahm
Price: US$ 1500
Description: The LMS features a programmable sine wave oscillator, dual
tracking filters with LP/HP/BP/BR modes, and a high-speed gating system for quasi-anechoic
measurements. Includes a calibrated condenser microphone referenced to B&K microphone.
Electrical and acoustical tests include: SPL response, gated SPL curves, rub/buzz test,
impedance response, Nyquist plots, polar plots, and inverse FFT. System utilities are
provided for scaling, smoothing, subtracting, dividing, and PASS/FAIL curve comparisons.
The Hilbert Transform is used to calculate an approximation to the phase curve. A macro
programming capability is included for automatic test operation. Measurement files can be
exported for use in loudspeaker CAD programs such as CALSOD and LEAP. A detuo is available
by anonymous ftp, and there is also a Web site (see address details listed elsewhere).
Name:
MLSSA 9. 0
Computer: MS-DOS
Distributor: DRA Laboratories
Agent: Harmonic Design GmbH, Munro Associates, and many others.
Price: US$3500 (hardware and software)
US$500 (MLSSA SPO Speaker Parameter option)
Description: MLSSA pioneered the maximumlength sequence (MLS) method of
system analysis, which has significant benefits over simple impulse response measurement
techniques. It has become a popular tool used by loudspeaker system designers and
acousticians. It is an 8-bit PC card, with a 12-bit A/D converter is used, and the maximum
sampling rate is 160kHz. Four sequence lengths are provided in hardware: 4K, 16K, 32K and
64K. MLSSA can measure a long impulse and store it to disk for later analvsis.
Measurements over a lkHz bandwidth can be performed with 0.06Hz resolution, or 1Hz
resolution over a 20kHz bandwidth. MLSSA can perform many mathematical operations on both
time and frequency domain data files including average, add, subtract, multiply, divide,
smoothing, convolution, correlation, and the inverse FFT. MLSSA also computes
reverberation time and other acoustical parameters in IEC-standard octave bands, as well
as energy-time curves (ETCs), absolute SPL and noise-criteria (NC) readings, speech
transmission index (STI), ISO 3382 acoustical parameters, lateral energy fraction. MLSSA
can act as an inductance and capacitance meter using impedance nieasurements (unaffected
by the test lead series resistance). MLSSA can compute the minimum-phase and excess phase
response from measured frequency response data, including the excess group delay which
makes it easier to check the minimumphase behaviour of speakers. An Adaptive Window
measurement technique is provided to mimic human hearing when performing room response
measuretaents so that they look more like they sound. An integrated macro processor is
provided, allowing complex sequences of commands to be recorded and played back.
Measurement files can be exported for use in loudspeaker CAD programs such as
CALSOD,
LEAP, and XOPT.Frequency domain data can be exported and imported in linear format or
logarithmic format for reduced file size. An additional software module (Speaker Parameter
option or SPO) al lows measurement of Thiele-Smal I and electro-mechanical driver
parameters us ing added-mass and closed-box methods. A rub detection measurement technique
is also provided, and automated quality control acceptance limits and pass/fail functions
are supported.
Name:
System Two
Computer: Microsoft Windows 3.11 and Windows 95
Distributor: Audio Precision inc
IRT Electronics Pty Ltd (Australia)
Price: SYS-2022 two-channel analog test set.
SYS-2222 analog domain test set plus DSP modules.
US$18000 SYS-2322 dual domain test set plus digital I/0.
SYS-2300 same as SYS-2322 but no analog domain capability. `
Description: The System Two is designed for use from an external
computer, including small notebook computers. It includes true Dual Domain architecture,
allowing measurements in both the analog and digital domains. Analog hardware gen'erator
and analog hardware analyzer for analog domain devices is separate and independent from
DSP modules which stimulate and analyze digital domain devices. Analog generator:
distortion120dB, flatness 0.01dB. Analog analyzer: res idual noise -117, 7dBu, flatness
0.01dB, residual THD+N -110dB (0. 0003%), and FFT analysis following analog notch filter
down to -140dB. Digital domain: signals are pure to -135dBFS, THD+N residuals below
-120dB, and FFT dynamic range and accuracy extend to -140dBFS. System Two's user interface
is the APWIN software (Windows 3. 11 and Windows 95 versions), and includes extensive
on-line help. APWIN features include: keystroke-learned test procedures, easy creation of
acceptance limits, sweeping with automatically computed steps or from tables, and a data
settling algorithm which maximizes sweep speeds while still providing stable, repeatable
data. FFT analysis via synchronous multi-tone techniques operates with no time domain
windowing function before the FFT, allowing for the first time proper noise measurements
of compressors, processors, and noise gates. Signals generated in both analog and digital
domains: sinewaves, squarewaves, SMPTE/DIN, CCIF, and DIM/TIM IMD signals. Additional
analog-generated signals include: random and pseudorandom white and pink noise, bandpassed
noise. Multitone signals are generated in the digital domain and available at both digital
and analog outputs. Predefined and user defined equalization curves can be applied to
analog or digital generator outputs during a sweep, or a tueasured parameter may be
equalized. Complete test setups and measurement results can be stored to disk for later
retrieval
.
Name:
TEF System 20
and Sound Lab Software
C0mputer: MS-DOS and Macintosh
Distributor: TEF Products
Price: US$5000 (dependent on hardware and software configuration)
Description: The TEF system is a computer-based analyzer designed to
make quick, accurate measurements of room acoustics, sound systems, and audio components.
TFF measuremonts are then used to help solve room acoustics problems, deiermine
installation parameters for large sound systems, or determine the performance of
individual system components. The term TFF is derived from “time, energy, frequency”.
if TFF functions are based on Time Delay
Spectrometry, a measurement method developed by the late Dr. Richard C. Heyser.
Measurement capabilities include: 3-D waterfall plots, production testing, frequency
response, phase response and group delay, polar response, frequency time curves, octave
noise measurements, energy time curve (ETC), Nyquist display, SPL meter, oscilloscope,
single channel FFT with up to 512k points, ALcons, RASTI, MLS measurements with 24kHz
bandwidth, data sample lengths 255-512k points, alternate sequence seeds, display modes
include overlay difference, and % octave smoothing, file import and export facilities in a
variety of formats. A seven-disk demo software set provides a comprehensive review of all
seven modules of the Sound Lab software.