How to estimate SPL from a microphone output ?
14 October 2025
When developing audio devices involving microphones, knowing the actual Sound Pressure Level (SPL) hitting your sensor is crucial. It…
When developing audio devices involving microphones, knowing the actual Sound Pressure Level (SPL) hitting your sensor is crucial. It…
The telecoil is the small coil inside your hearing aids that converts electromagnetic field to electrical energy. Create your hearing loop systems thanks to Knowles’ telecoils. They can be designed as passive, surface mount, active gain, and radio frequency solutions — including improved EMI performance on active units.
| Name | Diameter / length [mm] | Width [mm] | Product status |
|---|---|---|---|
| 5100-253441 | 3.57 | 3.21 | Not Recommended For New Designs |
| 5100-253444 | 8.89 | 2.29 | Not Recommended For New Designs |
| 5100-253446 | 5.33 | 1.8 | Not Recommended For New Designs |
| 5100-253447 | 6.63 | 2.18 | Not Recommended For New Designs |
| 5100-253450 | 6 | 2 | Not Recommended For New Designs |
| 5100-253630 | 5.08 | 2.2 | Not Recommended For New Designs |
| 5100-253662 | 4.94 | 2.15 | Not Recommended For New Designs |
| 5100-253685 | 5.82 | 1.9 | Not Recommended For New Designs |
| 5100-253690 | 6.6 | 1.2 | Not Recommended For New Designs |
The telecoil is the small coil inside your hearing aids that converts electromagnetic field to electrical energy. Create your hearing loop systems thanks to Knowles’ telecoils. They can be designed as passive, surface mount, active gain, and radio frequency solutions — including improved EMI performance on active units.
| Name | Diameter / length [mm] | Width [mm] | Product status |
|---|---|---|---|
| 5100-253441 | 3.57 | 3.21 | Not Recommended For New Designs |
| 5100-253444 | 8.89 | 2.29 | Not Recommended For New Designs |
| 5100-253446 | 5.33 | 1.8 | Not Recommended For New Designs |
| 5100-253447 | 6.63 | 2.18 | Not Recommended For New Designs |
| 5100-253450 | 6 | 2 | Not Recommended For New Designs |
| 5100-253630 | 5.08 | 2.2 | Not Recommended For New Designs |
| 5100-253662 | 4.94 | 2.15 | Not Recommended For New Designs |
| 5100-253685 | 5.82 | 1.9 | Not Recommended For New Designs |
| 5100-253690 | 6.6 | 1.2 | Not Recommended For New Designs |
When developing audio devices involving microphones, knowing the actual Sound Pressure Level (SPL) hitting your sensor is crucial. It…
When developing audio devices involving microphones, knowing the actual Sound Pressure Level (SPL) hitting your sensor is crucial. It…
The telecoil is the small coil inside your hearing aids that converts electromagnetic field to electrical energy. Create your hearing loop systems thanks to Knowles’ telecoils. They can be designed as passive, surface mount, active gain, and radio frequency solutions — including improved EMI performance on active units.
| Name | Diameter / length [mm] | Width [mm] | Product status |
|---|---|---|---|
| 5100-253441 | 3.57 | 3.21 | Not Recommended For New Designs |
| 5100-253444 | 8.89 | 2.29 | Not Recommended For New Designs |
| 5100-253446 | 5.33 | 1.8 | Not Recommended For New Designs |
| 5100-253447 | 6.63 | 2.18 | Not Recommended For New Designs |
| 5100-253450 | 6 | 2 | Not Recommended For New Designs |
| 5100-253630 | 5.08 | 2.2 | Not Recommended For New Designs |
| 5100-253662 | 4.94 | 2.15 | Not Recommended For New Designs |
| 5100-253685 | 5.82 | 1.9 | Not Recommended For New Designs |
| 5100-253690 | 6.6 | 1.2 | Not Recommended For New Designs |