Archive · 3 Dec 2025
PGI Professors Develop Ambulance Siren Noise Reduction Tech
Doctors from Panjab University and PGIMER found that loud ambulance sirens can make patients feel worse.
They created a new technology that makes the sirens quieter by 23 dB.
This technology is simpler and faster than old methods.
It uses special sounds to cancel out the loud noise, making it easier for ambulances to move through traffic without hurting patients' ears.
Professors Manoj Sharma and Ravindra Khaiwal developed technology to reduce ambulance siren noise by 23 dB.
Traditional noise control systems are bulky and complex, but the new technology uses Feedback ANC and VST for simplicity and effectiveness.
Continuous exposure to ambulance sirens at 100 dB can increase patients' mental and physical distress.
The new technology generates its own reference signal from the error signal, making it faster and more efficient.
The integrated VST expands the 'zone of silence,' allowing noise reduction even where microphones cannot be placed.
- Who
- Professor Manoj Sharma and Professor Ravindra Khaiwal
- What
- Developed technology to reduce ambulance siren noise
- When
- Not specified
- Where
- Panjab University and PGIMER
- Why
- To reduce patient distress caused by high noise levels
- Researchers
- Professor Manoj Sharma (UIET, Panjab University) and Professor Ravindra Khaiwal (PGIMER)
- Technology Used
- Feedback Active Noise Control (ANC) and Virtual Sensing Technology (VST)
- Noise Reduction
- 23 dB
- Current Ambulance Siren Noise Level
- 100 dB
- Impact of Noise
- Increased mental and physical distress in patients