Developement of a custom measurement bench for passive radiators
28 August 2025
A passive radiator is a rigid membrane attached to a flexible suspension that radiates an acoustic wave when it vibrates…
A passive radiator is a rigid membrane attached to a flexible suspension that radiates an acoustic wave when it vibrates…
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 |
A passive radiator is a rigid membrane attached to a flexible suspension that radiates an acoustic wave when it vibrates…
A passive radiator is a rigid membrane attached to a flexible suspension that radiates an acoustic wave when it vibrates…
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 |