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Soundproof earcovers

Acoustics – Auditorium
Patent

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Space unit for the recording and/or reproduction of acoustic sig

Acoustics – Auditorium
Patent

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Spark arresting muffler

Acoustics – Auditorium
Patent

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Spark arresting muffler for engines

Acoustics – Auditorium
Patent

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System and method for workspace sound regulation

Acoustics – Auditorium
Reexamination Certificate

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System for enhancing room acoustics

Acoustics – Auditorium
Patent

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