Noise Reduction - Intelligibility - Speech Recognition - Echo Cancellers - Echo Suppressors - Hands-Free Links                                                                         

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Speech Therapy -  Recording the spoken word  http://www.sospubs.co.uk/sos/1997_articles/jan97/spokenword.html
Hands-Free - Hands Free Articles, archives of  Wireless Week     http://www.wirelessweek.com/index.asp?SearchParam=Entire+Site&layout=search_all&text=hands-free
Voice Quality - Assessment tools, test equipment for 2-wire and 4-wire phone interfaces  http://www.gl.com/nanalogtestset.html
Speech Technology Magazine     http://www.speechtek.com/st.mag/index.shtml
Hands-Free
- Articles, archives of  Wireless Week     http://www.wirelessweek.com/index.asp?SearchParam=Entire+Site&layout=search_all&text=hands-free
NCT - http://www.nct-active.com
Oki Semiconductor
   http://www.okisemi.com/communicator/public/nf/docs/Intro-3590.html
Main Street Technology
- Clarity Echo Cancellers  http://www.2mainstreet.com/productline.php
Wavemakers - Speech Recognition  http://www.wavemakers.com/welcome/homepage.cfm
SIA - Smaart Acoustic Tools 4  http://www.siasales.com/siasactoolv1.html
Dynastat   http://www.dynastat.com/Testing%20&%20Evaluation.htm
The Speech Intelligibility
   http://www.mcsquared.com/ssdesign.htm
MEASURES OF SPEECH INTELLIGIBILITY
   http://www.nonoise.org/library/ane/ane.htm#sect6.2
Intelligent Speech Analyser™ (ISA) Software
  http://www.sci.fi/~pitchsys/index.html
Coherent
  http://www.coherent.com/products/index.html
Clarity
- "Clear Voice Capture"™ Technology  http://www.clarityco.com/clarity_website.htm
Telecom Recyclers Inc.
- Dealer   http://www.telecomrecyclers.com/EchoCancellers.html
ASPI Digital
- EF400 Echo Canceller   http://www.aspi.com/products/echofree/ef400.html
GL Communications
- Products  http://www.gl.com/nechocan.html
Japan Kyastem Co., Ltd
- Echo Canceller  http://www.kyastem.co.jp/english/e-eccan.html
Signal Processing Associates
- Digital, Acoustical   http://www.spa.com.au/products/echo_cancellation.html
Spirit Corp.
- Acoustic Echo Canceller   http://spiritcorp.com/acoustic_echo.html
The Echo Control Perspective    http://www.tellabs.com/news/articles/wsd0499.shtml
Echo Cancellation  http://teets.cba.ufl.edu/ism6223f00/romanip/echo.html
Echo Cancellation Tutorial   http://www.onforum.com/tutorials/echo_cancel/topic02.html