Welcome to Cochlear Concepts, LLC.
Some of the links may not be active--my apology for this. Thank you for your interest in this site.
Eric L. Carmichel, owner, can be reached at

Our mailing address:

1534 N Dorsey Ln
Tempe, AZ 85281





The link below goes to our parent site.

ELC Audio Engineering (click on image)

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Cochlear Concepts, LLC is a research-oriented business that provides innovative solutions for researchers involved with the speech and hearing sciences. Our hardware products are designed by ELC Audio Engineering. We work closely with audiologists, media production professionals, live sound engineers, acousticians, universities and hospitals.


Carmichel, E. L., F. P. Harris, & B. H. Story. “Effects of Binaural Electronic Hearing Protectors on Localization and Response Time to Sounds in the Horizontal Plane,” Noise & Health, Vol. 9, No. 37, 2007, pp. 83-95.
Carmichel, E. L. “Sound Localization Ability with Electronic Hearing Protectors” in Gus Mueller, “Page Ten,” The Hearing Journal, Vol. 57, No. 9, 2004, p. 16.
Carmichel, E. & Carmichel, J. “The Big Bang!” Outdoor Life, April 2000, pp. 68-73, 80.
Carmichel, E. L. “Diff Amp Driver with BJT Source,” Glass Audio, Vol. 7, No. 4, 1995, pp. 16, 17, 20.
Carmichel, E. “The 6BX7 Amplifier,” Glass Audio, Vol. 3, No. 2, 1991, pp. 9-11, 65.


SDAS - Sound Detection and Alarm System (US Patent 7315244). Includes patented features for minimization of false triggers. Click PATENT for more information.
Speech-Language Facilitator. Design and prototype sold to Kay Elemetrics. After further development by Kay Elemetrics, design is now known as KayPENTAX Model 3500 Facilitator. Click FACILITATOR for additional information.
ELC Audio Engineering Data Recording System. Automated data recording and stimuli presentation system integrates with popular Digital Audio Workstation (DAW) applications. Click DAW-DAQ for info.
Flight Control System (FLCS) test set designed, prototyped and documented (Technical Order) for use by the USAF.
CARPAL Engine Annunciator/Shutoff Unit. Original prototype purchased by Pepsi Cola for use in their diesel tractors.

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Copyright 2011 ELC Audio Engineering / Cochlear Concepts. All Rights Reserved

Photo Copyright 2011 Eric L. Carmichel