JPH0190099U - - Google Patents

Info

Publication number

JPH0190099U

JPH0190099U JP18682787U JP18682787U JPH0190099U JP H0190099 U JPH0190099 U JP H0190099U JP 18682787 U JP18682787 U JP 18682787U JP 18682787 U JP18682787 U JP 18682787U JP H0190099 U JPH0190099 U JP H0190099U

Authority

JP

Japan

Prior art keywords

mouth

partition

voice attenuator

ventilation holes

voice

Prior art date

1987-12-08

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

• 238000005192 partition Methods 0.000 claims description 5
• 238000009423 ventilation Methods 0.000 claims description 3
• 230000001755 vocal effect Effects 0.000 claims 1
• 238000012986 modification Methods 0.000 description 1
• 230000004048 modification Effects 0.000 description 1
• 210000003437 trachea Anatomy 0.000 description 1