- Since 1946 Knowles has helped designers find more ways to put better technology to work for their customers. Knowles is a market leader and global supplier of advanced micro-acoustic, specialty components, and human interface solutions in the mobile communications, consumer electronics, medical technology, and other industrial end markets. Knowles’ deep experience and rigorous testing delivers consistently dependable and precise products including speakers and microphones for hearing health products, premium music earphones, communications headsets, and industrial acoustic applications. Knowles MEMS (micro-electro-mechanical systems) microphones and micro-speakers are widely used in smartphones, tablets, notebooks, and other portable devices. More...

Headquartered in Itasca, Illinois, and publicly traded on the NYSE under the symbol “KN”, Knowles has more than 10,000 employees in 37 locations worldwide includes design centers in Europe, Asia and North America. All manufacturing facilities are ISO-9001 certified, with some additionally certified to ISO-14001 or OHSAS-18001. The Knowles Quality Management System ensures design, integrity, efficient manufacturing and the cost effective on-time delivery of their products. Less...

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Go To Product Training Module Index Page

Digi-Key’s library of more than 2000 exclusive PTM Online… On Demand® product training modules is a collection of training tools created with you – the busy design engineer – in mind. They are provided with the cooperation of participating supplier partners. From this one source, you can learn about the latest products and technologies, download datasheets, check inventory, contact our technical staff, and place an order for same-day shipment.

These modules are available in audio and non-audio formats and listed by supplier in easy-to-find alphabetical order. Simply locate the module that interests you and click on your format of choice. We hope you find these tools useful, and with new modules added continuously, we invite you to stop back often to see what’s new.

Product Training Modules Online...On Demand® is a registered trademark of Digi-Key Corporation.

Updated PTM = Updated Product Training Module - PTM        New PTM = New Product Training Module - PTM

Module NamePreviewAudioNon-AudioDurationParts List
  • Designing Balanced Armature Earphones
3MB1.5MB10 minParts List
  • Introduction To Microphones
3.0MB704KB10 minParts List
  • Measuring the Frequency Response of Balanced Armature Drivers and Earphones
3.2MB1.4MB10 minParts List
  • Ultrasonic Applications for Knowles Electret and MEMS Microphones
2.1MB878KB5 minParts List
  • Using Dynamic Speakers and Balanced Armature Drivers in In-Ear Wearables
3.6MB962KB5 minParts List

To view modules, you will need Adobe Flash Player 9, or greater, installed on your computer. Adobe Flash Player is available FREE from Adobe.

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TM Series MicrophonesTM Series Microphones - Knowles' TM series microphone boasts performance comparable to the standard EM series, in a package 20% smaller. The TM can also be used in directional applications as a matched omni-directional pair.  More...

EM SeriesEM Series - Knowles' EM Series is the most popular omni-directional microphone offered. The EM can also be used in directional applications as a matched omni-directional pair.  More...

Application Notes

Product Information

Acoustic Interface Design Guide 2010
Mic, Receiver, and Speaker Portfolio 2012
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