EXPANDED DYNAMIC RANGE MICROPHONES AND MICROPHONE ASSEMBLIES APPLICATION NOTE
●The majority of Knowles Electronics microphones have evolved in concert with hearing aid technology over many years. Many of the attributes of the microphones (small size, high signal/noise, etc.) also help enable commercial applications. Some common attributes, may not be compatible with certain applications. For instance, it is typically desirable for hearing aids to function on a 0.9V supply. For compatibility, many Knowles microphones are designed with a nominal signal bias voltage of 0.45V to maximize signal dynamic range in a hearing aid.
●The 0.45V signal bias also constrains the maximum dynamic range for the microphone at about 0.9Vpp signal voltage, which corresponds to a maximum sound pressure for linear signal output.
●To expand the sound pressure allowed for linear operation, a number of microphones are available that allow for signal bias at ½ of the supply voltage to allow full utilization. For the current set of available microphones, the maximum supply voltage allowable is 10VDC, so the available signal is approximately 10Vpp.
●A customized microphone element with external circuitry is required for center-bias capability.
EK-26899-P03 、 EK-26899-P58 、 EK-31144-P58 、 WP-30113-P03 、 FG45-32259-P03 、 FG45-32335-P03 、 FG45-32335-000 、 FG45-32491-000 、 VFG-34048-000 、 VFG-34049-000 、 VEK-H-30108-000 、 VWP-H-30109-000 、 VEK-H-30320-000 、 VEK-F-30470-000 |
|
Application note & Design Guide |
|
|
|
Please see the document for details |
|
|
|
|
|
|
|
English Chinese Chinese and English Japanese |
|
03-24-23 |
|
Revision: A |
|
HHAN-027 |
|
2 MB |
- +1 Like
- Add to Favorites
Recommend
- Knowles‘ Microstrip Filters Offer a High Repeatability and Temperature Stability from -55℃ to 125℃
- Knowles Introduced the MD Series, A Range of Medical-grade Capacitors for Implantable Designs
- Knowles Partners With Ole Wolff to Deliver Compact Hybrid Driver for TWS Earphones With HD Audio and ANC
- Knowles 3-Cell Supercapacitors Support Significant Jump in Energy Storage
- Knowles Microstrip Filter Helps Your Thin Film RF Devices to Achieve the Best Performance
- Knowles Releases New TWS Reference Design with Best-In-Class Music Experience and Advanced Features
- Knowles Provides a High-Precision and High-Reliability Machined and Plated Solutions for Passive Electronic Components
- Expanding Knowles‘ Filter Technology Offerings to Serve Low-Frequency Applications
All reproduced articles on this site are for the purpose of conveying more information and clearly indicate the source. If media or individuals who do not want to be reproduced can contact us, which will be deleted.