Sound Producing Devices TRIZ Cases
- Laboratory Mill Active Vibration Cancellation
Active counter-vibration system eliminates disruptive sound emissions through milling stock tubes without requiring mechanical enclosures.
- Acoustic Attenuator With Open Aperture For Noise Reduction
An acoustic attenuator with an elongate open aperture absorbs noise via cavity resonance while allowing air and water passage to resolve drainage trade-offs.
- Capacitor Power Supply for Battery-Free Doorbell
Capacitors replace batteries in this doorbell design, eliminating bulky components while maintaining stable voltage during button presses.
- Sound Masking via Speaker for Terminal Privacy
A terminal device generates a masking sound signal through its speaker to cover audio leaked from the receiver.
- High Frequency Horn Tuned Resonant Cavity Standing Wave Reduction
A tuned resonant cavity in the horn throat cancels standing waves from midrange leakage, correcting frequency response dips.
- Hybrid Adaptive Noise Cancellation Using Synthesized Reference Feedback
A hybrid adaptive noise cancellation system generates anti-noise signals using feedforward and feedback filters to minimize ambient audio sounds.
- Hybrid Analog Digital Feedforward ANC Headset
Combines analog and digital feedforward circuits to reduce signal processing delay in audio headsets.
- Active Noise Attenuation Device with Phase Shift Feedback
A noise control device generates a 180° phase-shifted signal to cancel ambient sound waves.