JPS62166219U - - Google Patents

Info

Publication number

JPS62166219U

JPS62166219U JP5289586U JP5289586U JPS62166219U JP S62166219 U JPS62166219 U JP S62166219U JP 5289586 U JP5289586 U JP 5289586U JP 5289586 U JP5289586 U JP 5289586U JP S62166219 U JPS62166219 U JP S62166219U

Authority

JP

Japan

Prior art keywords

helmet

vocalization

visual window

soundproofing

sound

Prior art date

1986-04-10

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

• 238000010521 absorption reaction Methods 0.000 claims description 3
• 239000000463 material Substances 0.000 claims description 3
• 230000000007 visual effect Effects 0.000 claims description 3
• 239000011358 absorbing material Substances 0.000 claims description 2
• 208000037656 Respiratory Sounds Diseases 0.000 claims 1
• 230000001755 vocal effect Effects 0.000 description 3
• 239000011248 coating agent Substances 0.000 description 1
• 238000000576 coating method Methods 0.000 description 1
• 239000000470 constituent Substances 0.000 description 1
• 238000010586 diagram Methods 0.000 description 1
• 238000009413 insulation Methods 0.000 description 1
• 238000009423 ventilation Methods 0.000 description 1