Open Audio Volume Control for Ambient Noise Awareness
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Solution Overview
Problem
Existing audio devices that obstruct the ear canal inhibit users from hearing ambient noise, making it difficult to maintain awareness of surroundings and interact with others socially.
Innovation Solution
A wearable open audio device that automatically adjusts sound pressure level (SPL) based on ambient noise, allowing users to hear both audio output and their environment without manual volume adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If earbuds create a seal in the ear canal to deliver sound, then audio output quality is improved, but the user's ability to hear ambient noise deteriorates
Solution Approach 1:
The audio device is divided into separate functional components: an open earbud that does not seal the ear canal, allowing ambient noise to pass through while the device delivers audio output. This segmentation between the physical structure (open design) and the audio delivery function resolves the contradiction by maintaining both ambient awareness and audio quality.
Solution Approach 2:
The patent introduces an intermediary system consisting of ambient noise sensors and automatic volume control algorithms that mediate between the audio output and the user's auditory experience. This intermediary automatically adjusts volume based on detected ambient noise levels, ensuring audio remains audible without requiring ear canal sealing.
2Illumination intensity
If volume is increased to overcome ambient noise, then audio audibility is improved, but sound leakage to others worsens
Solution Approach 1:
The device incorporates ambient noise sensors that continuously monitor the acoustic environment and provide feedback to an automatic volume control system. This feedback loop enables real-time adjustment of audio output volume, increasing it when ambient noise is high and decreasing it when ambient noise is low, thereby maintaining audio audibility while minimizing sound leakage to others.
Solution Approach 2:
The audio device performs self-adjustment of volume levels based on its own sensing capabilities. The embedded sensors and processing algorithms enable the device to autonomously optimize its output without user intervention, automatically balancing audibility requirements against sound leakage concerns.
3Adaptability or versatility
If manual volume adjustment is required to adapt to ambient noise changes, then audio output adaptability is improved, but user operation complexity worsens
Solution Approach 1:
The audio device autonomously adapts to changing ambient noise conditions through integrated sensors and automatic volume control algorithms. The system continuously monitors the acoustic environment and self-adjusts output levels without requiring any manual user intervention, thereby achieving high adaptability while maintaining simple operation.
Solution Approach 2:
Real-time feedback from ambient noise sensors drives automatic volume adjustment, enabling the device to adapt to environmental changes seamlessly. This feedback mechanism eliminates the need for manual user adjustments while maintaining optimal audio output levels across varying noise conditions.
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 device provides a seamless listening experience by minimizing leakage and ensuring the audio output is always greater than ambient noise by a threshold amount, enhancing user awareness and social interaction.
Implementation Method 1
detects the ambient noise
Implementation Method 2
automatically adjusts a volume of an audio output based, at least in part, on the detected ambient noise
Data Source
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Figure 2B
AI summary
Methods and apparatus are provided for automatically adjusting, by an audio device, the SPL of its audio output. As described herein, the SPL is adjusted based on detected ambient noise. According to aspects, audio device iteratively adjusts the SPL based on the ambient noise. According to aspects, the SPL is adjusted to be greater than the ambient noise by a threshold SPL amount. According to aspects, the audio device outputs sound in substantially a first direction and the microphone detects sound substantially outside of the first direction. The adjusted sounds are output by the audio device.