Voice Message Delivery SNR Adjustment in Ambient Noise
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Solution Overview
Problem
Existing voice systems in environments with ambient noise, such as cars or homes, face challenges in ensuring clear speech intelligibility due to external and system-related noise factors, which conventional techniques fail to adequately address, particularly when external noise is uncontrollable and speaker placement is variable.
Innovation Solution
A method and system that continuously monitor ambient noise, adjust message volume based on calculated Signal-to-Noise Ratio (SNR) to ensure clear delivery, and repeat messages if the actual SNR falls below a minimum threshold, utilizing a microphone to record and analyze noise levels and adjust message power accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional techniques adjust system components like radio volume or close windows to reduce noise, then speech intelligibility may improve, but user convenience deteriorates due to unwanted system state changes
Solution Approach 1:
The system automatically monitors ambient noise levels and adjusts message volume without requiring user intervention. The microphone continuously records ambient noise, the analyzing unit processes the noise data, and the adjusting unit automatically modifies message volume to maintain optimal speech intelligibility, making the system self-regulating and convenient for users
Solution Approach 2:
The system implements a closed-loop feedback mechanism where the microphone continuously monitors ambient noise levels, the analyzing unit processes this information, and the adjusting unit modifies message volume accordingly. This ongoing feedback loop ensures speech intelligibility is maintained while avoiding disruptive system state changes
2Reliability
If the system increases message volume to overcome ambient noise, then speech intelligibility improves, but harmful effects increase due to potential listener discomfort or distraction
Solution Approach 1:
The system dynamically changes the volume parameter of the message based on real-time ambient noise measurements. By continuously monitoring noise levels and adjusting message volume accordingly, the system maintains optimal speech intelligibility while preventing excessive volume that could cause listener discomfort or distraction
3Reliability
If the system uses fixed speaker placement to ensure message delivery, then speech intelligibility improves, but adaptability deteriorates when speaker position varies
Solution Approach 1:
The system transitions from static fixed speaker placement to dynamic adaptive volume adjustment. By continuously monitoring ambient noise and automatically adjusting message volume, the system compensates for variable speaker positions and environmental conditions, maintaining reliable message delivery regardless of speaker placement flexibility
Data Source
AI summary
A method for delivering a message to a recipient in an environment with ambient noise includes the steps of recording the ambient noise in the environment at a certain time interval, analyzing the recorded ambient noise to obtain an average power Pnoise or a RMS amplitude Anoise of the ambient noise, providing a predetermined desired SNRdesired, calculating an average signal power Psignal or a RMS amplitude Asignal of the message to be delivered based on the Pnoise or Anoise and the desired SNRdesired, and adjusting a volume of the message to be delivered according to the Psignal or Asignal. Alternatively, the actual SNRactual will be computed and the message will be repeated if the SNRactual falls below the SNRmin. Systems for delivering a message to a recipient in an environment with ambient noise and computer-readable media having computer-executable instructions for carrying out the methods are also provided.