Technical bulletins

Number Title Description Downloads
TB-03 Effects of sound inlet variations on microphone response

The impact of various sound inlet tubing is discussed, including tubing diameter, length, and acoustic resistance impact on microphone reponse peak frequency, high frequency sensitivity, and overall microphone sensitivity.

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(440.55 kB)

TB-04 Soldering transducer leads

Recommended procedures and process parameters for prepping and soldering to Knowles Electronics transducers. Details on terminal construction, external leads, soldering iron, solder, flux, fixtures, and tools physical requirements are presented along with lead soldering and lead removal methods.

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(1.08 MB)

TB-08 The transducer environment

Protocols for transducer handling, holding fixtures, soldering, contaminants, ESD, temperature, humidity, radiation, and pressure changes are listed. Also, application guidelines and recommendations for shock and vibration, contaminants, ESD, temperature, humidity, radiation, and pressure are detailed.

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(467.08 kB)

TB-16 Electronics response shaping of directional microphones

The use of analog RC filter networks to shape the low-frequency and high-frequency responses of Knowles directional microphones. Also includes implementation suggestions on the equalization of Knowles microphones in directional applications.

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(182.96 kB)

TB-21 EB directional hearing aid microphone application notes

Overview of EB series directional microphones along with a definition of directional mic terminology, the impact of port resistances and rear-port delays. Four major design goals of the EB microphone - sensitivity, frequency response curve shape, polar pattern response, and signal-to-noise performance - are examined in detail.

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(1.08 MB)

TB-23 Mounting application notes

General transducer physical mounting suggestions for antishock mounting, soldering, and acoustic transmission are reviewed.

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(228.26 kB)