Designing the Future of Sound: Seltech New Capabilities in Sound Design!
15 September 2025
In a world where every interaction counts, sound has become a powerful tool for shaping how users experience technology…
In a world where every interaction counts, sound has become a powerful tool for shaping how users experience technology…
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 | Description | Diameter / length [mm] | Width [mm] | Thickness [mm] | Directivity | Impedance [Ohm] | Nominal Voltage [V] | Sensitivity @ 1kHz [dBV re. 1V/Pa] | Sensitivity Tolerance [± dB] | SNR [dB] | AOP [dB] | Connection | Product status |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| BU-27135-141 | Accelerometer | 7.87 | 5.54 | 2.24 | Single Axis | 19000 | 1.5 | -11.5 | 3 | NA | NA | 3-Wire | Active |
|
| BU-21771-000 | Accelerometer | 7.87 | 5.54 | 4.06 | Single Axis | 5200 | 1.5 | -25 | 3 | NA | NA | 3-Wire | Preferred |
|
| BU-23173-000 | Accelerometer | 7.87 | 5.54 | 4.06 | Single Axis | 5200 | 1.5 | -19 | 3 | NA | NA | 3-Wire | Preferred |
|
| BU-23842-000 | Accelerometer | 7.87 | 5.54 | 2.24 | Single Axis | 5200 | 1.5 | -20 | 3 | NA | NA | 3-Wire | 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 | Description | Diameter / length [mm] | Width [mm] | Thickness [mm] | Directivity | Impedance [Ohm] | Nominal Voltage [V] | Sensitivity @ 1kHz [dBV re. 1V/Pa] | Sensitivity Tolerance [± dB] | SNR [dB] | AOP [dB] | Connection | Product status |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
| BU-27135-141 | Accelerometer | 7.87 | 5.54 | 2.24 | Single Axis | 19000 | 1.5 | -11.5 | 3 | NA | NA | 3-Wire | Active |
|
| BU-21771-000 | Accelerometer | 7.87 | 5.54 | 4.06 | Single Axis | 5200 | 1.5 | -25 | 3 | NA | NA | 3-Wire | Preferred |
|
| BU-23173-000 | Accelerometer | 7.87 | 5.54 | 4.06 | Single Axis | 5200 | 1.5 | -19 | 3 | NA | NA | 3-Wire | Preferred |
|
| BU-23842-000 | Accelerometer | 7.87 | 5.54 | 2.24 | Single Axis | 5200 | 1.5 | -20 | 3 | NA | NA | 3-Wire | Active |
In a world where every interaction counts, sound has become a powerful tool for shaping how users experience technology…
In a world where every interaction counts, sound has become a powerful tool for shaping how users experience technology…
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 | Description | Diameter / length [mm] | Width [mm] | Thickness [mm] | Directivity | Impedance [Ohm] | Nominal Voltage [V] | Sensitivity @ 1kHz [dBV re. 1V/Pa] | Sensitivity Tolerance [± dB] | SNR [dB] | AOP [dB] | Connection | Product status |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
| BU-27135-141 | Accelerometer | 7.87 | 5.54 | 2.24 | Single Axis | 19000 | 1.5 | -11.5 | 3 | NA | NA | 3-Wire | Active |
|
| BU-21771-000 | Accelerometer | 7.87 | 5.54 | 4.06 | Single Axis | 5200 | 1.5 | -25 | 3 | NA | NA | 3-Wire | Preferred |
|
| BU-23173-000 | Accelerometer | 7.87 | 5.54 | 4.06 | Single Axis | 5200 | 1.5 | -19 | 3 | NA | NA | 3-Wire | Preferred |
|
| BU-23842-000 | Accelerometer | 7.87 | 5.54 | 2.24 | Single Axis | 5200 | 1.5 | -20 | 3 | NA | NA | 3-Wire | Active |