Earplug and method for manufacturing the same
First Claim
1. A method for manufacturing an earplug including a shell to be worn at least in part in a user'"'"'s ear canal and an acoustic output transducer unit, mounted within said shell, for sound output at an inner end of said shell, comprising:
- determining a desired sound frequency response function of said output transducer unit when mounted within said shell, establishing an acoustic model of said shell including said output transducer unit, and forming a shell having a receptacle for mounting said output transducer unit within said shell and a sound cavity connecting said output transducer unit to a sound outlet opening at said inner end of said shell, wherein said sound cavity is shaped and sized according to said model in order to tune an actual sound frequency response of said output transducer unit according to said desired sound frequency response of said output transducer unit.
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Accused Products
Abstract
The invention relates to an active hearing protection earplug comprising a shell (2000) to be worn at least in part in a user'"'"'s ear canal and being adapted to attenuate sound waves arriving at the outer end (2001) of the shell, and an active system (2002, 2010) comprising an input transducer (2024) for converting ambient sound into audio signals, an audio signal processing unit (2028) for processing said audio signals, and an output transducer unit (2010) mounted within the shell for converting said processed audio signals into sound output at the inner end of the shell, wherein the amplification of the active system is negative and wherein the output transducer unit comprises at least two separate outputs (2032, 2034). The invention also relates to a method for manufacturing such an earplug.
18 Citations
5 Claims
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1. A method for manufacturing an earplug including a shell to be worn at least in part in a user'"'"'s ear canal and an acoustic output transducer unit, mounted within said shell, for sound output at an inner end of said shell, comprising:
- determining a desired sound frequency response function of said output transducer unit when mounted within said shell, establishing an acoustic model of said shell including said output transducer unit, and forming a shell having a receptacle for mounting said output transducer unit within said shell and a sound cavity connecting said output transducer unit to a sound outlet opening at said inner end of said shell, wherein said sound cavity is shaped and sized according to said model in order to tune an actual sound frequency response of said output transducer unit according to said desired sound frequency response of said output transducer unit.
- View Dependent Claims (2, 3, 4, 5)
Specification