Electric/Electromagnetic Audible Signalling TRIZ Cases
- Dual Alert Replacement Reminder for Disaster Preparedness Alarms
A flashing reminder followed by a user-triggered sound alert helps prevent missed replacement of disaster preparedness alarms.
- Doorbell–Smoke Detector Audio Links for Two-Way Communication
Wireless transceivers let a doorbell and interior smoke detector exchange microphone and speaker audio, improving visitor communication.
- PIR Sensor Sensitivity Adjustment for Motion Detection
Dynamic PIR sensitivity adjustment reduces false positives by verifying motion with image data.
- Buzzer Control Signal Modulation for Volume Stability
A pulse-frequency-variable buzzer control signal generates acoustic alerts with stable volume output.
- Acoustic Device Dual Resonance Alarm Sound Pressure
Dual resonance acoustic device increases sound pressure across multiple alarm frequencies by separating vibration member and housing resonance peaks.