4. Acoustics
  5. Sound-modifying means
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Device for controlling a propagation direction of noise

Acoustics – Sound-modifying means – Sound absorbing fence or screen
Patent

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Device serving the noise control of sound energy radiated from t

Acoustics – Sound-modifying means – Sound absorbing fence or screen
Patent

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Duct liner acoustic splice

Acoustics – Sound-modifying means – Sound absorbing fence or screen
Reexamination Certificate

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