SOUND SILENCING APPARATUS

PURPOSE:To reduce air pressure sound occurring at the outlet end of a tunnel by a method wherein compressional wave in the tunnel is detected by a pressure gauge, and negative pressure wave for offsetting the compressional wave is produced on a signal outputted on detection by the pressure gauge and...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	INUI MASAAKI, TSUJIMOTO YOSHIKAZU, OMAE YUKIO, NISHIMURA MASAHARU, YAMASHITA TOSHIO, KOJIMA SATOSHI, IMAI YUTAKA
Format:	Patent
Sprache:	eng
Schlagworte:	ACOUSTICS ACOUSTICS NOT OTHERWISE PROVIDED FOR ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTIONOF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, ORTHE LIKE CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES EARTH DRILLING FIXED CONSTRUCTIONS METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING,NOISE OR OTHER ACOUSTIC WAVES IN GENERAL MINING MUSICAL INSTRUMENTS PHYSICS SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, ORDRAINING IN OR OF MINES OR TUNNELS SOUND-PRODUCING DEVICES
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