Stiffness controlled diaphragm as a possible sound attenuation solution
25 July 2024
Originally inspired by telegraph and telecom domains, the audio industry has seen first uses of the audio equalization with…
Originally inspired by telegraph and telecom domains, the audio industry has seen first uses of the audio equalization with…
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 |
Originally inspired by telegraph and telecom domains, the audio industry has seen first uses of the audio equalization with…
Originally inspired by telegraph and telecom domains, the audio industry has seen first uses of the audio equalization with…
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 |
Headquarters
SAS SELTECH
2, Allée des Cerisiers
F – 94042 Créteil FRANCE
Tel EU : +33 1 48 92 90 02
Tel NA : +1 (919) 481 6896
SELTECH is an international solution provider with deep expertise in acoustics and sensors. We offer innovative solutions to our customers’ challenges, from design to production.