Acoustics – Anatomic or prosthetic relation – Ear and mouth
Reexamination Certificate
2007-07-10
2007-07-10
Sircus, Brian (Department: 2836)
Acoustics
Anatomic or prosthetic relation
Ear and mouth
C181S129000, C181S131000
Reexamination Certificate
active
10925136
ABSTRACT:
The invention relates to a hearing protection earplug, comprising a hard shell (10) having an elasticity of from shore D 85 to shore D 65 and having an outer surface individually shaped according to the measured inner shape of the user's outer ear and ear canal for being worn at least in part in the user's ear canal, the shell comprising a filter cavity (12) having at least one orifice (20, 30, 40) into which a passive acoustic filter element (21, 31) is inserted for forming, together with said orifice, a passive acoustic filter. The invention also relates to a use of such an earplug and a method for manufacturing such an earplug.
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European Search Report dated Dec. 28, 2004 for application No. 04020175.8.
Berg Christian
Meier Hilmar
Phonak AG
Safran David S.
Sircus Brian
Willoughby Terrence R.
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