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LUTEar Core Routines Library 1.0.1 - for auditory simulation investigations.

  Please find below the README file for the Core Routines Library mentioned
above.  The UNIX, DOS (Borland C/C++) and Macintosh (THINK C) platform
versions are now available via anonymous FTP from:-

        suna.lut.ac.uk ( /public/hulpo

  Connect via FTP then login with user name "anonymous" and give your
e-mail address as the password.  Download and read the "lutear101.INSTALL"
file from the "/public/hulpo" directory, then follow the installation
procedure for your platform.  If you have any problems at all, do not
hesitate to get in contact with me.

Various changes have been made since release version 1.0.0 last week:

(i)     The Macintosh self extracting library had been uploaded incorrectly
- this has been tested.

(ii)    The compressed archive for the DOS platform installation is now
available, with installation information.

(iii)   Several small bugs have been fixed in the files:


(iv)    The manual format has been changed slightly, and several errors
have been corrected: the installation details for the DOS platform, paper
references for the appropriate test programs and a bibliography -- have
been added.  I have also ensured that the text version of the manual was
saved with end-of-line breaks (this was not done for the UNIX versions for
the last release).

  I would like to thank all those who have already sent messages concerning
the last release - they have been most encouraging, and your suggestions
etc. will be incorporated where possible.

  Any other comments, improvements, additions or corrections you may wish
to suggest are very welcome; it is only by direct feed-back from users that
I can ensure that the Core Routines Library is a delight to use, as well as
implementing state of the art auditory models.


1       Introduction

        The auditory models developed by the Speech and Hearing
Laboratory, at Loughborough University of Technology (UK.), have
received much attention, due principally to their simple form and
the many published papers in which the models are used to
explain auditory phenomena.  The many requests for the
computer code of the model simulations has led to the group to
release the LUTEar Core Routines Library (CRL, version 1.0).  The
library brings together established models, developed by the
group, and contributed by other researchers in the field, which
simulate various stages in the auditory process.

        The library has a modular structure which can be used to
create auditory investigation/application systems or incorporated
in existing code, as required.  All the modules conform to a simple
standard format.  It is a development based on the meld of
experimental investigation methods and the tenets of good
software engineering practice.  The library is intuitive in
application, and has comprehensive error reporting embedded in
efficient code.

        Included with this release is a comprehensive series of test
programs.  These programs were used to test the CRL routines;
they reproduce the published behaviour of the respective models
included.  The programs also provide examples of how the CRL
may be used in auditory investigation programs.  In addition the
programs read data from parameter files, and thus can be readily
used to investigate further the behaviour of the models included
in the CRL.

        At the time of writing there are no known major
shortcomings in the CRL that have not been fixed, due to careful
and exhaustive testing.  No system, however, is infallible so it is
hoped that, with the gentle admonitions of the library's users, any
problems or omissions will be quickly corrected.  In addition it is
expected that the library will be augmented by further models as
the scientific endeavour continues.
1.1     List of CRL Features

(i)     Modular Structure.
(ii)    Processing stage data can be handled by a single unit.
(iii)   Processing stage units can link to data from other stages.
(iv)    Multichannel data is handled invisibly.
(v)     Efficient algorithms are used throughout.
(vi)    Meaningful routine and variable names are used.
(vii)   All routines are prefixed by their module name.
(viii)  Comprehensive error handling incorporated in routines.

1.2     Future Additions to the Core Routines Library

        Version 1.0.1 of the CRL is a very basic first release.  It
incorporates only the modules used by the Loughborough
University of Technology (LUT), Speech and Hearing laboratory.
The release has served to produce a superstructure upon which to

        The plan is to continue adding more modules and facilities
as investigations of the auditory system continue.  It is also
intended to incorporate existing models produced by other
workers into the CRL.  It is the general policy to gratefully accept
any code, models or suggestions from anybody who wishes to
offer them.  These additional ideas are very welcome and will be
implemented whenever possible.

        The more immediately planned additions to the CRL will be:

(i)     Read stimulus data from file:
        - AIFF, ADC, SDI & SDII sound formats;
        - simple text format.

(ii)    Meddis93 Probabilistic Hair Cell model.

(iii)   Other established hair cell models.

(iv)    Centre Frequency list generation using physical
spacing on the basilar membrane.

(v)     Auditory nerve Model.

(vi)    Cochlear nucleus model.

(vii)   Use non-linear fitting for two-component adaptation.

(viii) Anything else which comes to the fore.

2       Installation.

        Read the file lutear.INSTALL for installation instructions.
Further information is given in the manual.  This can be found in
the "docs" directory after unpacking the compressed archive.

|Dr. Lowel P. O'Mard      |                 /\  /  \                      |
|Dept. of Human Sciences, |      /\/\    /\/  \/ /\ \  /\          Speech |
|University of Technology,|_/\/\/ /\ \/\/ /\  /\/  \ \/ /\/\_ /\___  &    |
|Loughborough,            |   \/\/  \/\/\/  \/ /\   \/\/ /\  /    Hearing |
|Leics. LE11 3TU, U.K.    |      \  /\/\/\  /\/  \  /\/\/  \/  Laboratory |
|L.P.OMard@uk.ac.lut      |       \/      \/      \/                      |