Transducer Circuit Damping TRIZ Cases
- Signal Processing Device Noise Cancellation Clock Synchronization
A signal processing device synchronizes audio sampling with a fixed noise cancellation clock to maintain filter stability.
- Active Noise Reduction Adaptive Filter Stability
A noise-reduction apparatus segments filter updates into transient and steady-state phases to balance speed and stability.
- Electric Rocking Mode Damper for Micro Speakers
Figure-8 detection coils identify membrane tumbling to drive electromagnetic damping forces in mobile micro speakers.
- Magnetic Negative Spring Loudspeaker Radial Stability
Segmented magnets in a magnetic negative spring loudspeaker provide radial stability and linear force cancellation for the moveable armature.
- Ear-canal Earpiece with Oscillatable Diaphragm for Ambient Sound
An ear canal earpiece uses an oscillatable diaphragm to seal the canal while transmitting ambient sound.
- Acoustic Transducer Non-Linear Compensation via Diaphragm Position Feedback
A controller calculates correction factors based on diaphragm position to adjust voice coil current.
- Piezo Actuator Noise Reduction Helicopter Power Plant
Piezo actuators replace heavy inertia masses to reduce weight while suppressing structureborne noise transmission in helicopters.
- Flat Voice Coil Vibration Speaker for Thin Design
Horizontal vibration eliminates vertical mass blocks, reducing thickness while increasing magnetic field strength.
- Active Noise Reduction Filter Saturation Correction
An active noise reduction device corrects reference signals using simulated acoustic transfer characteristics to adjust cancelling sound amplitude.
- Variable Whitening Filter for Hearing Aid Feedback Cancellation
Segmenting the error and reference paths preserves desired tones while the whitening filter reduces autocorrelation artefacts in feedback estimation.
- Diagonalization Filter Matrix for Active Noise Cancellation
A diagonalization filter matrix decouples active noise cancellation into offline tuning and real-time adaptation.
- Adaptive Residual Feedback Suppression in Hearing Aids
A hearing aid gain processor adjusts output levels based on input signal power to manage residual feedback.
- Speaker Diaphragm Excursion Calculation and Protection
A speaker protection device estimates diaphragm excursion using feedback signals to prevent physical damage.
- Adaptive Noise Cancellation System for Audio Headsets
An adaptive noise cancellation system generates anti-noise signals by adjusting filter responses based on source audio presence.
- Acoustic Loudspeaker With Resistive Damping for Bass Optimization
A loudspeaker uses a resistive component across a second coil to adjust the damping factor and optimize bass response.
- Hybrid Adaptive Noise Cancellation Secondary Path Estimation
A hybrid adaptive noise cancellation system uses a secondary path estimate adaptive filter to model electro-acoustic paths.
- Vehicle Noise Masking Device Pitch-Shifted Signal Adjustment
A noise masking device pitch-shifts masker signals to match vehicle noise frequencies.
- Audio Interference Control via Wireless Message Exchange
Wireless message exchange coordinates audio settings between terminals to reduce noise interference without adding hardware complexity.
- Adaptive ANC Circuit Handling Direction-Dependent Ambient Sound
An adaptive noise canceling circuit detects ambient audio characteristics to generate precise anti-noise signals for personal devices.