Active Hearing Protection Audio Signal Switching
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Solution Overview
Problem
Existing hearing protection systems lack a comfortable and flexible communication function, as they often fail to seamlessly integrate external audio signals with ambient sound captured by microphones, leading to suboptimal user experience.
Innovation Solution
An active hearing protection system featuring a central digital audio signal processing unit that automatically controls audio signal processing based on the presence of external audio signals, allowing for flexible combination of communication audio with ambient sound, and incorporating customizable earplugs with active units and a boom microphone for enhanced noise reduction and communication capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If external audio signals are integrated with ambient sound captured by microphones, then communication function is improved, but system complexity increases
Solution Approach 1:
A central unit acts as an intermediary between external audio sources and the earplugs, managing audio signal processing and automatically switching between different audio sources. This centralizes complexity in one component while keeping the earplugs themselves relatively simple.
Solution Approach 2:
The audio signal processing unit is designed to handle multiple audio sources (external audio signals and ambient sound from microphones) and automatically switch between them, providing multi-functional capability within a single system.
2Ease of operation
If automatic audio signal processing control is implemented, then user experience is improved, but processing requirements increase
Solution Approach 1:
The system automatically detects the presence of external audio signals and switches processing modes accordingly, providing feedback-based automatic control that improves user experience without requiring manual intervention.
Solution Approach 2:
The audio signal processing unit autonomously manages audio source selection and processing mode switching based on detected signal presence, making the system self-serve and automatically adapt to user needs.
3Object-affected harmful factors
If noise reduction is enhanced, then hearing protection is improved, but communication clarity may deteriorate
Solution Approach 1:
The system dynamically switches between different audio sources and processing modes depending on whether external audio signals are present, allowing optimal noise reduction during ambient sound capture while maintaining communication clarity when external signals are active.
Solution Approach 2:
The audio signal processing unit changes processing parameters automatically based on the detected presence of external audio signals, adjusting noise reduction levels and signal mixing ratios to maintain both protection and clarity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system provides a comfortable and flexible communication function by automatically adjusting audio processing to prioritize communication audio, ensuring effective noise reduction and improved user experience through customizable and adaptive noise management.
Implementation Method 1
a microphone for capturing audio signals from ambient sound
Implementation Method 2
a loudspeaker for providing audio signals to a user
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
The invention relates to an active hearing protecting system comprising a right earplug (10) and a left earplug (12) and a central unit (14) to be worn at the user's body and comprising a digital audio signal processing unit (34) which has at least two channels and which can be connected via an audio input (40) to an external audio signal source (20), wherein each earplug (10, 12) comprises a microphone (28) for capturing audio signals from ambient sound and a loudspeaker (30) which are connected to the audio signal processing unit (34), wherein the central unit comprises a detector (56) for detecting the presence of an audio signal at the audio input (40, 52), and wherein the central unit (14) is adapted to control the audio signal processing unit (34) in such a manner that, during times when no presence of an audio signal at the audio input (40, 52) is detected, the audio signal processing unit (34) is operated in an ambient mode in which the audio signals captured by the left ear microphone (28) are provided to the left ear loudspeaker (30) and the audio signals captured by the right ear microphone (28) are provided to the right ear loudspeaker (30), and during times when the presence of an audio signal at the audio input (40, 52) is detected, the audio signal processing unit (34) is operated in a communication mode in which the audio signals received via the audio input (40, 52) are provided to at least one of the left ear (30) loudspeaker and the right ear loudspeaker (30) and the audio signals captured by at least one of the left ear microphone (28) and the right ear microphone (28) are provided to at least the other one of the left ear loudspeaker (30) and the right ear loudspeaker (30).