Majority of our modern day microphones are based on Dr. James Edward West's invention of the microphone in 1962. Dr West developed the Electroacoustic Transducer Electret Microphone with Gerhard Sessler, a colleague, while working at Bell laboratories. The foil-electret transducers they develop
- why can't i print in the message area? [Last Updated On: November 7th, 2009] [Originally Added On: November 7th, 2009]
- smoke detectors [Last Updated On: November 7th, 2009] [Originally Added On: November 7th, 2009]
- Insulation drawings [Last Updated On: November 7th, 2009] [Originally Added On: November 7th, 2009]
- Boiler. [Last Updated On: November 7th, 2009] [Originally Added On: November 7th, 2009]
- Electrical Harmonics [Last Updated On: November 7th, 2009] [Originally Added On: November 7th, 2009]
- axial thrust [Last Updated On: November 7th, 2009] [Originally Added On: November 7th, 2009]
- Pl inform which make suitable for this specification [Last Updated On: November 7th, 2009] [Originally Added On: November 7th, 2009]
- CapsLock [Last Updated On: November 7th, 2009] [Originally Added On: November 7th, 2009]
- How to Calculate Drag Reduction Factor for surge analysis [Last Updated On: November 7th, 2009] [Originally Added On: November 7th, 2009]
- cable..pls help [Last Updated On: November 7th, 2009] [Originally Added On: November 7th, 2009]
- 11Kv joints [Last Updated On: November 7th, 2009] [Originally Added On: November 7th, 2009]
- how to calculate required torque? [Last Updated On: November 7th, 2009] [Originally Added On: November 7th, 2009]
- IP rating for enclosures [Last Updated On: November 7th, 2009] [Originally Added On: November 7th, 2009]
- 11kv JOINTS SPACING ON PARALLEL CABLES [Last Updated On: November 7th, 2009] [Originally Added On: November 7th, 2009]
- beep sounds [Last Updated On: November 7th, 2009] [Originally Added On: November 7th, 2009]
- Increse speed of pneumatic cylinder [Last Updated On: November 7th, 2009] [Originally Added On: November 7th, 2009]
- Pipe fittings-Manufacturing/Quality Assurance [Last Updated On: November 7th, 2009] [Originally Added On: November 7th, 2009]
- kango memolition hammer [Last Updated On: November 7th, 2009] [Originally Added On: November 7th, 2009]
- Loss calculation in undergound Transmission Cables [Last Updated On: November 7th, 2009] [Originally Added On: November 7th, 2009]
- Design in ASP.NET [Last Updated On: November 7th, 2009] [Originally Added On: November 7th, 2009]
- axial pump [Last Updated On: November 7th, 2009] [Originally Added On: November 7th, 2009]
- Auger bit [Last Updated On: November 7th, 2009] [Originally Added On: November 7th, 2009]
- Pipe [Last Updated On: November 7th, 2009] [Originally Added On: November 7th, 2009]
- Centrifugal oil filter ideas [Last Updated On: November 7th, 2009] [Originally Added On: November 7th, 2009]
- When to install Horizontal Condensate Pot (Probably also called Spun Type) ?? [Last Updated On: November 7th, 2009] [Originally Added On: November 7th, 2009]
- Confusion about a Resistance Bulb [Last Updated On: November 7th, 2009] [Originally Added On: November 7th, 2009]
- Loop testing for a NON-HART 4 wire instrument [Last Updated On: November 7th, 2009] [Originally Added On: November 7th, 2009]
- My VAWT Project, next phase [Last Updated On: November 7th, 2009] [Originally Added On: November 7th, 2009]
- voltage doubler [Last Updated On: November 7th, 2009] [Originally Added On: November 7th, 2009]
- How to build corners and joints using Red Oak timbers? [Last Updated On: November 7th, 2009] [Originally Added On: November 7th, 2009]
- THERMAL OIL BOILER [Last Updated On: November 7th, 2009] [Originally Added On: November 7th, 2009]
- How Do You Get a Degree in Green Energy? [Last Updated On: November 7th, 2009] [Originally Added On: November 7th, 2009]
- deareator pegging [Last Updated On: November 7th, 2009] [Originally Added On: November 7th, 2009]
- 99 ford ranger with no brake pedal at all [Last Updated On: November 7th, 2009] [Originally Added On: November 7th, 2009]
- CAD tool for electronic circuitry design [Last Updated On: November 7th, 2009] [Originally Added On: November 7th, 2009]
- hvac [Last Updated On: November 7th, 2009] [Originally Added On: November 7th, 2009]
- Unfinalized video miniDVD data recovery [Last Updated On: November 7th, 2009] [Originally Added On: November 7th, 2009]
- eletronics [Last Updated On: November 7th, 2009] [Originally Added On: November 7th, 2009]
- codless phones programming [Last Updated On: November 7th, 2009] [Originally Added On: November 7th, 2009]
- Effectiveness in cooling a drink with ice than water? [Last Updated On: November 7th, 2009] [Originally Added On: November 7th, 2009]
- Free Vibration Analysis of Tapered Composite Wings [Last Updated On: November 8th, 2009] [Originally Added On: November 8th, 2009]
- Can You Treat Composite Beams or Wings Mathematically like Isotropic Wings? [Last Updated On: November 8th, 2009] [Originally Added On: November 8th, 2009]
- Particle, Particle in Space, Tell Me About Earthquakes [Last Updated On: November 8th, 2009] [Originally Added On: November 8th, 2009]
- Russian Rocket Engine – Best in the World [Last Updated On: November 8th, 2009] [Originally Added On: November 8th, 2009]
- New Online Evaluation of Laminated Composite Stiffnesses [Last Updated On: November 8th, 2009] [Originally Added On: November 8th, 2009]
- 'Autonomous' helicopters teach themselves to fly [Last Updated On: November 8th, 2009] [Originally Added On: November 8th, 2009]
- Next Target – Jupiter [Last Updated On: November 8th, 2009] [Originally Added On: November 8th, 2009]
- NASA's FERMI, Space, and Time [Last Updated On: November 8th, 2009] [Originally Added On: November 8th, 2009]
- Lunchtime Salon Today in L.A. [Last Updated On: November 8th, 2009] [Originally Added On: November 8th, 2009]
- A vote for McCain is a vote against science [Last Updated On: November 8th, 2009] [Originally Added On: November 8th, 2009]
- NASA Study Investigates Mental Overload in Pilots [Last Updated On: November 8th, 2009] [Originally Added On: November 8th, 2009]
- NASA Releases Columbia Crew Safety Report [Last Updated On: November 8th, 2009] [Originally Added On: November 8th, 2009]
- What the Stimulus Package Means for Science [Last Updated On: November 8th, 2009] [Originally Added On: November 8th, 2009]
- All Scientists Have Conflicts of Interest (Duh) [Last Updated On: November 8th, 2009] [Originally Added On: November 8th, 2009]
- Congress Considers Killing Open-Access Journals [Last Updated On: November 8th, 2009] [Originally Added On: November 8th, 2009]
- Transmission Swing Angle [Last Updated On: December 12th, 2009] [Originally Added On: December 12th, 2009]
- Long Weld Neck Flanges [Last Updated On: December 12th, 2009] [Originally Added On: December 12th, 2009]
- Super Critical Fluid Extraction for Rose Oil [Last Updated On: December 12th, 2009] [Originally Added On: December 12th, 2009]
- Capacitor Bank Calculations [Last Updated On: December 12th, 2009] [Originally Added On: December 12th, 2009]
- Power Supplies and Dummy Loads [Last Updated On: December 12th, 2009] [Originally Added On: December 12th, 2009]
- Standards for Piping Vibration [Last Updated On: December 12th, 2009] [Originally Added On: December 12th, 2009]
- Automatic Generator Changovers [Last Updated On: December 12th, 2009] [Originally Added On: December 12th, 2009]
- Synchronous Generators [Last Updated On: December 12th, 2009] [Originally Added On: December 12th, 2009]
- Suzuki Swift Brakes - Squeaks and Whistles [Last Updated On: December 12th, 2009] [Originally Added On: December 12th, 2009]
- Flange Serration [Last Updated On: December 12th, 2009] [Originally Added On: December 12th, 2009]
- Hydraulic Shapes and Reciprocating Machines [Last Updated On: December 12th, 2009] [Originally Added On: December 12th, 2009]
- No Shortage of Engineers After All! [Last Updated On: December 12th, 2009] [Originally Added On: December 12th, 2009]
- Delta Starter Diagram [Last Updated On: December 12th, 2009] [Originally Added On: December 12th, 2009]
- 2002 Chevy Duramax Diesel - Low Voltmeter Reading [Last Updated On: December 12th, 2009] [Originally Added On: December 12th, 2009]
- Energy Survey and Consumer Mapping Methodoogy [Last Updated On: December 12th, 2009] [Originally Added On: December 12th, 2009]
- Setback for Geothermal Energy [Last Updated On: December 12th, 2009] [Originally Added On: December 12th, 2009]
- Darlington Amplifier [Last Updated On: December 12th, 2009] [Originally Added On: December 12th, 2009]
- Diesel Storage Tank Design [Last Updated On: December 12th, 2009] [Originally Added On: December 12th, 2009]
- Car MPG Questions [Last Updated On: December 12th, 2009] [Originally Added On: December 12th, 2009]
- Dark LCD Display [Last Updated On: December 12th, 2009] [Originally Added On: December 12th, 2009]
- Calculating the Strength of Concrete Floors [Last Updated On: December 12th, 2009] [Originally Added On: December 12th, 2009]
- Hitachi Projection TV [Last Updated On: December 12th, 2009] [Originally Added On: December 12th, 2009]
- WW II Water-Injected Engines [Last Updated On: December 12th, 2009] [Originally Added On: December 12th, 2009]
- Soap to Prevent A1H1N1 Contamination [Last Updated On: December 12th, 2009] [Originally Added On: December 12th, 2009]
- Car won't shift out of first gear [Last Updated On: December 12th, 2009] [Originally Added On: December 12th, 2009]