主题：常见电声设计软件

Name: CASD (Computer-Aided Speaker Design)
Computer: MS-DOS
Distributor: Scientific Design Software
Price: US$199 (?)
Description: Design of enclosures for closed-box, vented-box and
passive-radiator systems. All systems can include a 2nd
order circuit for design of filter assisted systems. Plots
frequency response and displacement response curves.

Name: Crossover Design Plus
Computer: MS-DOS
Distributor: Old Colony Sound Lab
Programmer: G.R. Koonce
Price: US$20
Description: This program is intended primarily for the design of two-
way and three-way passive crossovers. It also includes
programs for evaluating the suitability of drivers for
application in closed, vented, and passive-radiator
enclosures (only a subset from the Driver Evaluation Plus
package).

Name: Driver Evaluation Plus
Computer: MS-DOS
Distributor: Old Colony Sound Lab
Programmer: G.R. Koonce
Price: US$20
Description: This program evaluates the suitability of drivers for
application in closed, vented, and passive-radiator
enclosures. It designs vented boxes in detail, complete
with port duct calculations. These programs, in general,
will not handle closed-box, passive-radiator, large-signal,
or equalized-enclosure design. The disk contains the
original 1984 version of BoxResponse, but none of the
recent upgrades are incorporated into it.

Name: FilterCAD 1.41
Computer: MS-DOS
Distributor: Linear Technology Corporation
Programmer: Richard F. Zarr
Price: Free if used to design filters based on LTC components.
Description: Facilitates the design of active filters of various orders
and response shapes that are based on switched capacitor
biquads from LTC.

Name: FilterCAD
Computer: Microsoft Windows 3.1
Distributor: LinearX Systems Inc
Price: US$695
Description: FilterCAD is a program for the design and analysis of
active filter circuits, and it produces component values as
part of its analysis. When an analysis is completed, the
program displays the circuits magnitude, phase and group
delay response, as well as the schematic diagram of the
circuit required to produce the network, including the
component values. Many different circuit topologies are
supported, and include first-order to eighth-order lowpass,
highpass, bandpass, band reject, and multipass circuits. A
demo is available by anonymous ftp, and there is also a Web
site (see address details listed elsewhere).

Name: Filter Designer 1.5
Computer: MS-DOS
Distributor: SpeakEasy
Price: US$195
Description: Passive and active filter design.

Name: FilterPro
Computer: MS-DOS
Distributor: Burr-Brown Corporation
Price: Free
Description: To aid in the design of active filters (Butterworth,
Bessel, and Chebyshev), Burr-Brown provides a series of
FilterPro computer-aided design programs (FILTER1, FILTER2,
and FILTER42). These are available for downloading from the
Burr-Brown BBS. Product literature describing the use of
Burr-Brown components is also available (AB-017C, AB-035C,
AB-017C, AB-034B, PDS-1070C).

Name: Filter Workshop
Computer: Microsoft Windows 3.1
Distributor: Old Colony Sound Lab, Synergetic Audio Concepts
Author: Frank Ostrander
Price: US$80
Description: Filter Workshop contains passive network design tools and
is an instructional resource for network design. Passive
network calculations include: design of attenuation
networks (L-pads), highpass and lowpass filters, shelving
networks (both highpass and lowpass), band-reject filters
(parallel LCR conjugate networks), inductor winding
calculations, and impedance correction networks (RC
conjugates). Component values are determined based on
resistive termination. Standard filter functions include:
1st to 5th-order Bessel, Butterworth, Chebyshev (three
types), Gaussian, and Linkwitz-Riley functions.

Name: Fitduct
Computer: MS-DOS
Distributor: Old Colony Sound Lab
Price: US$25
Description: An aid to the designer of vented enclosures, Fitduct
calculates vent dimensions using a more sophisticated
algorithm than the simple equation that is normally
applied. The user is required to provide two initial sets
of length/tuning data, which are obtained by experimental
measurements with the proposed enclosure, to which Fitduct
applies a curve-fitting equation. Then, given the desired
vent resonance frequency, the program will return the
correct length of the vent.

Name: Itemizer 4.0
Computer: MS-DOS
Distributor: R & R Drummond Inc
Programmer:
Price:
Description: This program generates efficient layouts for cutting sheet
material into desired sizes. The user specifies their cut
list and sheet stock, then sets the cutting parameters (saw
kerf, for example). The software generates the layouts and
provides functions for their viewing, printing, and
refining. Additional functions compute layout statistics
such as cost analysis and overall material efficiency.
The Web page at http://www.woodweb.com/sftware.html
contains a link to a downloadable demo of this software.

Name: JBL SpeakerShop 1.0
Computer: Microsoft Windows 3.1
Distributor: JBL Consumer Products
Price: US$99
Description: See BassBox software.

Name: LADP (Loudspeaker Analysis and Design Program) for Windows
Computer: Microsoft Windows 3.1
Distributor: Old Colony Sound Lab
Price; US$135
Description: LADP performs modelling, small signal analysis, and design
of ported (standard or isobarik, and 6th-order active
filtered), sealed (standard or isobarik, and 4th-order
active filtered), passive radiator, bandpass, tubed, and
horn-loaded enclosures. Bandpass enclosures (4th to 7th
order) can be designed and effects of changing the front
and/or rear volume can be examined. Large signal analysis
is provided for ported (standard, series isobarik, or
parallel isobarik), sealed enclosures. An active highpass
filter (1st to 4th order) can be used to act as an
infrasonic filter. Port dimension calculation for all
designs and one to four ports is available. LADP can also
design highpass and lowpass filters (1st to 4th order),
including Bessel, Butterworth, Linkwitz-Riley, Chebyshev,
and Legendre-Papoulis. Bandpass filters of order one or two
can be constructed for all above types except Bessel. Up to
three filter responses at a time can be displayed,
including the phase angle. Polar plots of loudspeaker
response are available in the +/- 90 degree range. Some
basic architectural acoustics analysis can be undertaken,
including room reverberation, impulse response, and room
modal distribution. On-line help is provided to supplement
information for each dialog box. It also contains helpful
hints for designing, building, and testing enclosures and
crossovers, as well as general car stereo information.

Name: LASIP for Windows 3.0
Computer: Microsoft Windows 3.1x, 386 PC w. 4 Mb RAM.
Distributor: RCM Akustik
Programmer: Michael Kapp
Price: US$27 (approximate)
Description: LASIP (Lautsprecher Simulations Programm) calculates boxes
(closed, vented, closed rear chamber bandpass) and passive
crossovers (1st-order to 4th-order, including Butterworth,
Linkwitz-Riley, and Bessel). A database is included for
storage of driver parameters, with search and sort
facilities - up to 300 drivers per packet. Data can be
imported from ASCII - up to two frequency-amplitude columns
and one impedance column. An editor is included and data
can be edited or entered manually. LASIP simulates 1-way,
2-way, 3-way or 4-way speakers with filters with up to 10
components (inductors, capacitors or resistors) per filter
channel. The system can be simulated and the user can
manually change the values of each component in the filter
(no automatic optimization routines are provided). Woofers
can be entered in parallel and/or in compound. LASIP
provides the capability of the new Thiele-Small parameters
with added weight to the diaphragm. Closed and vented boxes
are simulated through the method described by Bullock or
Hoge, or using a table built into the software. LASIP can
display frequency plots and excursion plots (at 2.83 volt)
as well as transients through an impulse response plot
(comparison between several methods is available). LASIP
supports measurement of driver parameters and calculation
of Thiele-Small parameters by entering Re, Fres, Zres, Fl
and Fh. Vas can also be calculated (by the Added Weight
and Closed Box Volume methods). A box design module is
included, where the box can be shown in perspective or in a
cut, volume calculation with subtraction of reflex tubes
and inner braces etc. A piece-list can be printed (with 19
mm or 22 mm wall thickness).

Name: LEAP 4.56 (Loudspeaker Enclosure Analysis Program)
Computer: MS-DOS
Distributor: LinearX Systems Inc
Programmer: Chris Strahm
Price: US$395 (base system)
US$175 (additional modules)
US$1195 (full system)
Description: LEAP contains a wide assortment of capabilities that
pertain to transducer design, enclosure design, passive
network design, active filter design, as well as complete
system design. Importing and exporting of data is supported
in a variety of formats. Graphs include SPL on-axis
response, SPL power response, transducer impedance, network
input impedance, port air velocities, transducer excursion,
and filter transfer functions. Modelling of sealed or
vented highpass and bandpass enclosures, including mutual
coupling between multiple ports and drivers, as well as
non-linear port effects is supported. Includes a built-in
utility for speaker parameter determination from impedance
measurements, and parameter correlation check. Driver
voice-coil impedance models include frequency dependent
resistive and reactive components. An extensive driver
library is provided, which can also be updated and expanded
by the user. LEAP data can be exported to other loudspeaker
CAD programs such as CALSOD. A demo is available by anonymous
ftp, and there is also a Web site (see address details listed
elsewhere).

Name: Loudspeaker Enclosure and Crossover Design V3.6 (LECD)
Computer: MS-DOS
Distributor: Old Colony Sound Lab
Programmer: Gendale Technology
Price: US$80
Description: LECD shows the SPL of two-way or three-way speaker systems
against frequency, based on parameters entered and
enclosures chosen. Sealed, vented, sealed-vented and
vented-vented enclosures are catered for. Passive crossover
network components for 1st through 4th order Bessel,
Butterworth, Chebyshev, Gaussian, Linkwitz-Riley, and
Legendre filters are calculated. The effect of speaker
polarity and speaker offset can be modelled. Available
graphs include: SPL/frequency response of each speaker in
its enclosure; peak cone excursion of each speaker; on-axis
SPL of complete system in magnitude, phase, phase delay or
group delay; transfer function of each crossover filter
section (woofer, midrange, tweeter) in magnitude and phase;
input impedance magnitude and phase of each speaker and the
complete system; equivalent squarewave response of the
crossover filters and loudspeakers. A 109-page 190x229mm
manual is provided.

Name: LMP "Souped Up" Edition (Loudspeaker Modelling Program)
Computer: MS-DOS and Apple Macintosh
Distributor: Sitting Duck Software & Old Colony Sound Lab
Programmer: Ralph Gonzalez, Bill Fitzpatrick
Price: US$50 (MS-DOS), US$40 (Apple Macintosh)
Description: LMP is a speaker system modelling program and crossover
network design utility. It is designed to model multi-way
systems, with the resulting frequency and phase response
curves predicting the on-axis sound pressure level produced
by the interaction of your choice of crossover, drivers,
and enclosure design. The Macintosh version adds visual and
audible square-wave prediction using the internal speaker
or audio output jack.

Name: Loudspeaker 6.0
Computer: MS-DOS
Distributor Maximum Effort Software
Price: US$65
Description: Box design for many different enclosures plus crossover
network design.

Name: Loudspeaker Design Powersheet
Computer: MS-DOS
Distributor: Old Colony Sound Lab
Programmer: Marc Bacon
Price: US$50 (Basic version)
US$70 (Professional version)
Description: A spreadsheet program for computer-aided speaker design
(requires a spreadsheet such as Lotus 1-2-3, Microsoft
Excel, or Borland Quattro Pro. The professional version
covers: 19 different types of bass loading with graphing
capabilities; volume calculation for 5 different enclosure
shapes; evaluation of cavity resonances, rectangular panel
resonances, and the coincidence effect; 24 different types
of crossovers, 10 miscellaneous programs for shaping
circuits, Zobels, room interaction, and coil design; 8
programs for evaluating driver parameters and losses;
electrical laws; conversion factors; room acoustics. A
Basic version which includes 41 of the above programs is
also available. Individual programs are accessed through a
menu tree, and context sensitive help and an introductory
README.1ST file are also included.

Name: Low Frequency Designer 3.0
Computer: MS-DOS
Distributor: SpeakEasy
Programmer: Michael Chamness
Price: US$195
Description: Low-frequency loudspeaker modelling of closed-box,
vented-box, bandpass, and isobarik enclosures. Available
plots include sound pressure and driver displacement, both
of which can be viewed at the simultaneously. Curve
families can be defined that allow you to study the effect
of varying a single system parameter. Printing capability
is included, mouse operation and writing of data files is
supported, and full online help is available. The program
works internally in 1/6-octave intervals over the 2Hz-2kHz
frequency range, and allows you to set a plot frequency
range within this interval. A curve fit mode is available,
which varies parameters to try and fit the system response
to a desired response curve.

Name: LspCAD Lite
Computer: Microsoft Windows
Programmer: Ingemar Johansson (Ingemar.Johansson@lu.erisoft.se)
Price: Shareware
Description: Computer software for simulation of closed, bass reflex and
sealed rear chamber bandpass enclosures. It runs under
Windows 3.1, 95 and NT and is complete with a manual in
English and requires no registration code. Features
include: SPL at 1 metre distance; impedance curve; cone
excursion; port air speed for bass reflex and bandpass
boxes; port standing wave effects on the SPL of bandpass
boxes are shown; printout capabilities; project files;
table lookup/computation of optimal box volume and port
tuning. The software is available from these locations:
http://www.simtel.net/pub/simtelnet/win3/cad/lspcad10.zip
ftp://ftp.simtel.net/pub/simtelnet/win3/cad/lspcad10.zip