Dynamic vs. Electrostatic Microphones: the Difference
17/06/2026
While both convert acoustic pressure into electrical signals, their operating principles lead to significant differences in sensitivity, band…
While both convert acoustic pressure into electrical signals, their operating principles lead to significant differences in sensitivity, band…
Knowles is the leading manufacturer of balanced armature drivers for the fast-evolving high-volume hearing health sector. With Knowles Receiver-in-Canal (RIC) module solution tailored to deliver high performance of sound quality in small form factor balanced armature drivers for versatile hearing aids device.
| Image | Name | Dim X [mm] | Dim Y [mm] | Dim A [mm] | Dim B [mm] | Product status |
|---|---|---|---|---|---|---|
| RVA-90429-N01 | -1.7 | 15.8 | 10.9 | 0.75 | Active |
|
| RVA-90429-N02 | -1.7 | 15.8 | 10.9 | 0.75 | Active |
|
| RVA-90429-N03 | 2.1 | 16.1 | 10.9 | 1.63 | Active |
|
| RVA-90429-N04 | 2.1 | 16.1 | 10.9 | 1.63 | Active |
|
| RVA-90429-N05 | 5.4 | 16.3 | 11.1 | 2.05 | Active |
|
| RVA-90429-N06 | 5.4 | 16.3 | 11.1 | 2.05 | Active |
|
| RVA-90429-N07 | 9.7 | 16.6 | 11.4 | 2.82 | Active |
|
| RVA-90429-N08 | 9.7 | 16.6 | 11.4 | 2.82 | Active |
The BU Series piezo-ceramic accelerometer has output from 20 Hz to above 10 kHz, and is used primarily as a contact microphone for high noise environments. It may also be used as an accelerometer with lightweight structures. As a contact microphone, the BU may be worn on the throat, or touching a bony part of the head (top, temple, or mastoid bone). BU has been integrated into helmet designs for radio communication for military and emergency services.
| Image | Name | Dim X [mm] | Dim Y [mm] | Dim A [mm] | Dim B [mm] | Product status |
|---|---|---|---|---|---|---|
|
| RVA-90429-N01 | -1.7 | 15.8 | 10.9 | 0.75 | Active |
|
| RVA-90429-N02 | -1.7 | 15.8 | 10.9 | 0.75 | Active |
|
| RVA-90429-N03 | 2.1 | 16.1 | 10.9 | 1.63 | Active |
|
| RVA-90429-N04 | 2.1 | 16.1 | 10.9 | 1.63 | Active |
|
| RVA-90429-N05 | 5.4 | 16.3 | 11.1 | 2.05 | Active |
|
| RVA-90429-N06 | 5.4 | 16.3 | 11.1 | 2.05 | Active |
|
| RVA-90429-N07 | 9.7 | 16.6 | 11.4 | 2.82 | Active |
|
| RVA-90429-N08 | 9.7 | 16.6 | 11.4 | 2.82 | Active |
While both convert acoustic pressure into electrical signals, their operating principles lead to significant differences in sensitivity, band…
While both convert acoustic pressure into electrical signals, their operating principles lead to significant differences in sensitivity, band…
The BU Series piezo-ceramic accelerometer has output from 20 Hz to above 10 kHz, and is used primarily as a contact microphone for high noise environments. It may also be used as an accelerometer with lightweight structures. As a contact microphone, the BU may be worn on the throat, or touching a bony part of the head (top, temple, or mastoid bone). BU has been integrated into helmet designs for radio communication for military and emergency services.
| Image | Name | Dim X [mm] | Dim Y [mm] | Dim A [mm] | Dim B [mm] | Product status |
|---|---|---|---|---|---|---|
|
| RVA-90429-N01 | -1.7 | 15.8 | 10.9 | 0.75 | Active |
|
| RVA-90429-N02 | -1.7 | 15.8 | 10.9 | 0.75 | Active |
|
| RVA-90429-N03 | 2.1 | 16.1 | 10.9 | 1.63 | Active |
|
| RVA-90429-N04 | 2.1 | 16.1 | 10.9 | 1.63 | Active |
|
| RVA-90429-N05 | 5.4 | 16.3 | 11.1 | 2.05 | Active |
|
| RVA-90429-N06 | 5.4 | 16.3 | 11.1 | 2.05 | Active |
|
| RVA-90429-N07 | 9.7 | 16.6 | 11.4 | 2.82 | Active |
|
| RVA-90429-N08 | 9.7 | 16.6 | 11.4 | 2.82 | Active |