JPS62180728U - - Google Patents

Info

Publication number

JPS62180728U

JPS62180728U JP6803486U JP6803486U JPS62180728U JP S62180728 U JPS62180728 U JP S62180728U JP 6803486 U JP6803486 U JP 6803486U JP 6803486 U JP6803486 U JP 6803486U JP S62180728 U JPS62180728 U JP S62180728U

Authority

JP

Japan

Prior art keywords

duct

measurement box

measurement

noise

box

Prior art date

1986-05-06

Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)

Pending

Links

• Espacenet
• Global Dossier
• Discuss

• 238000005259 measurement Methods 0.000 claims description 10
• 239000011358 absorbing material Substances 0.000 claims description 2
• 239000011148 porous material Substances 0.000 claims description 2
• 238000010586 diagram Methods 0.000 description 2
• 230000000052 comparative effect Effects 0.000 description 1
• 230000000694 effects Effects 0.000 description 1

Cited By (1)