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The isolator helmet: How Hugo Gernsback’s bizarre 1925 invention was designed to block 95% of sound and induce total concentration amongst workers and inventors

Source: Times of India
Category: General
Region: General
Published: May 18, 2026 at 09:30
πŸ”— Read Full Article at Times of India ✨ Extract Article
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isolator helmet hugo gernsback bizarre invention designed block sound induce

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