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Past Event: Electrostatic Drivers for Earphones: Navigating the Potholes

November 28, 2018 at 7:30 pm

Location: Shure Incorporated, 5800 W. Touhy Ave, Niles, IL 60714

Speaker(s): Roger Grinnip, Principal Acoustical Engineer at Shure Incorporated

Electrostatic transducers are mechanically simple and can provide a number of performance benefits when used in acoustic applications.  However, electrostatic transducers carry a stigma, are viewed as exotic, and have not found mainstream acceptance except in condenser/electret microphones.  To most, the complication seems to stem from the unique electrical requirements, but a close look at the basic operation uncovers additional complications that can impede the performance benefits.  To shrink the electrostatic transducer down to an earphone driver, with optimal performance, requires recognizing these “potholes” and finding the path to compromise.

About The Presenter


Roger Grinnip is a Principal Engineer with Shure Incorporated.  He’s been with Shure Incorporated for 17 years and worked exclusively on acoustical transducers, with his most recent designs ultimately becoming the KSM8 dynamic microphone and the KSE1500 electrostatic earphone.  His interests include physical acoustics, structural acoustics, computational acoustics, (a little bit of) circuit design, and most other things related to electroacoustic systems.

Other Business: Dinner (optional, but please RSVP) will begin at 6:30pm. Contact Giles Davis (gilesdavis@motorola.com) by Tuesday, November 27 if you would like to join us. Sandwiches and chips from Jimmy John's will be provided. Please let Giles know if you have a preference for vegetarian, gluten-free, etc. Price is $10 for non-members and $8 for members and students (please bring cash).

View Official Meeting Report

More Information


Posted: Thursday, November 15, 2018

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