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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| 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. |
|
| TB-05 | Walk induced head vibrations and hearing aid design |
Review of various sources of human body movement induced vibration that impact hearing aid performance, including "head thumps", "walk acceleration", and other physical motions that hearing aids interpret as spurious acoustic signals. |
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| TB-08 | Microphone and Balanced Armature Receiver Handling and Environmental Guidelines |
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. |
|
| 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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| TB-23 | Mounting application notes |
General transducer physical mounting suggestions for antishock mounting, soldering, and acoustic transmission are reviewed. |
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