Hearing aid companies:
www.oticon.com/
www.widex.dk
www.gnresound.com/home.aspx
www.phonak.com/
www.rexton.com/
 

General acoustics:
www.bath.ac.uk/~ensmjc/Links/acoustics.html
www.campanellaacoustics.com/faq.htm
 

General:
www.hear-it.org/
National Institute of Deafness and other Communication Disorders
 

Calculation programs:
www.measure.demon.co.uk/software.html
http://hearing.psychol.cam.ac.uk/Demos/demos.html

AI calculation:
server1.cdsp.neu.edu/info/students/hmuesch/
 

Auditory general:
Auditory demos and calculation programs for Brian Moore et al., Cambridge, UK:
hearing.psychol.cam.ac.uk/Demos/demos.html

Keele Auditory Didactic Models by E.F. Evans: Basilar membrane, Organ of Corti, Cochlear nerve
www.keele.ac.uk/depts/co/audio.html
www.keele.ac.uk/depts/co/auditory/home.htm

Auditory Toolbox, MATLAB:
rvl4.ecn.purdue.edu/~malcolm/interval/1998-010/
 

Speech:
www.speech.psychol.ucl.ac.uk
www.dcs.shef.ac.uk/~martin/
www.dcs.shef.ac.uk/~pdg/sphear/sphear.htm
www.nsi.edu/users/patel/speech_database.html
www.phon.ucl.ac.uk/home/brain/
 

Audiometer companies:
www.interacoustics.dk/
www.gnotometrics.com/
 

Sound Loudness:
hyperphysics.phy-astr.gsu.edu/hbase/sound/loudcon.html
hyperphysics.phy-astr.gsu.edu/hbase/hframe.html
 

Tinnitus related:
homed.inet.tele.dk/hamann/ressourcer.htmlAmerican

Mèniére og Tinnitusforeningen (in Danish):
www.mtf.dk
 

Hearing Education and Awareness for Rockers:
www.hearnet.com/index.shtml
www.betterhearing.com
 

The cochlear model of Frank Baumgarte:
www.tnt.uni-hannover.de/~baumgart/peri_ear/
www.tnt.uni-hannover.de/~baumgart/publications.html
 

Some other links:
www.physik.uni-oldenburg.de/

Landsforeningen for bedre hørelse, LBH (in Danish):
www.lbh.dk
 

Glossary:
On hearing, hearing protectors and hearing aids:
www.freehearingtest.com/glossary.shtml