The small size of hearing aids and the vibration they produce pose unique and challenging acoustic problems. One Danish maker, GN ReSound, is working to address these issues using automated near-field acoustic holography. "We wanted to get into a situation where things were more predictable, with a better understanding, so we could be more professional with better tools. This was one of the tools to build up our simulation models and understanding," said Poul Kristensen, senior acoustic engineer at the company.
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