Noise Generation TRIZ Cases
- Digital Fluctuating Oscillator Using Lookup Table Feedback
A lookup-table digital oscillator replaces analog transient and noise circuits, cutting circuit scale while simplifying frequency tuning.
- Fluctuating Oscillator Circuit Using Input Noise for Weak Signal Sensing
By reusing high-frequency uncorrelated input noise, this oscillator enables stochastic resonance sensing of weak signals with less circuit scale and tuning effort.
- Thermally Insulated Neuron Oscillator for Stable Low-Power ONN
A thermal insulating structure enables self-sustained neuron oscillation with low voltage, reduced heat loss, and no extra compensation circuitry.
- Anti-Noise Signal Generator With Dual-Path Low-Latency Filtering
A dual digital filtering path combines high-rate sigma-delta processing with tuneable lower-rate filtering to cut ANC latency and phase shift.
- Headset Proximity Control for Low-Power Battery Saving
Proximity sensing between headset earpieces triggers low-power mode, cutting idle drain and extending battery run time without manual action.
- Loudspeaker-Integrated Error Sensing for Fast Active Noise Cancellation
Placing the error sensor on the loudspeaker front face cuts secondary path delay and keeps active noise cancellation robust in high-temperature exhausts.
- Modular Aviation Headset Interface for Compact Multi-Use Operation
Separate ports for headset, microphone, and aircraft links make aviation audio gear more compact while preserving compatibility and power flexibility.
- Band-Limited Noise Phase Control for Tunable Crest Factor
Phase-tuned multi-sine generation sets a target crest factor in band-limited test signals, improving SNR without violating amplitude limits.
- ANC Secondary Path Adaptation Sequencing for Downlink Tone Stability
Tone detection pauses secondary path filter adaptation during downlink ringtones, preventing ANC instability and preserving noise cancellation.
- Active Noise Reduction Speaker Switching to Prevent Amplifier Clipping
Dynamic switching between arrayed and in-phase speakers expands the cancellation zone and avoids amplifier clipping during high-noise events.
- Adaptive ANC Filter Updates for Stable Personal Audio
Threshold-based error monitoring skips unstable ANC filter updates, keeping personal audio noise cancellation effective in changing conditions.
- Engine Harmonic Cancellation Leakage Control for Afterglow Noise
Temporary leakage-factor changes let engine harmonic cancellation cut output tone quickly after RPM drops, avoiding audible afterglow.
- Active Engine Noise Reduction with Harmonic Output Limiting
Engine harmonic estimates limit loudspeaker output in vehicle active noise reduction, preventing instability artifacts without shutdown.
- Self-Feedback Random Generator Using Frequency-Modulated Noise
A DAC-fed feedback loop modulates oscillator frequency to break output regularity and produce less predictable random codes for secure electronics.