One LED lights up on positive swings and the other on negative ones, the intensities being proportional to the signal levels
| Authors | Nick Cornford |
| Main Document | Article «Revealing the infrasonic underworld cheaply. Part 1 - Seeking a solution» |
| Description | Figure 7 |
| File Format / Size | PDF / 13 Kb |
| Document Language | English |
Other Materials from the Main Document
- Article «Revealing the infrasonic underworld cheaply. Part 1 - Seeking a solution»
- Figure 1. Simple equalization can extend the low-frequency response of an electret microphone down to well under 1 Hz
- Figure 2. The response of Figure 1's circuit to air-pressure changes at different frequencies
- Figure 4. A circuit that simulates an electret microphone in real life
- Figure 5. A few milliseconds of over-voltage applied across the mic at start-up injects enough charge to counterbalance much of the FET's longer-term start-up drift
- Figure 7. One LED lights up on positive swings and the other on negative ones, the intensities being proportional to the signal levels
