Blast Attenuating Earplug
AssigneeThe Johns Hopkins University
InventorDaniel H. Simon
Life of this patent
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Abstract
An earplug includes a body, insertable into an ear canal, where the body defines a channel having at least two ends. The channel can house a movable structure configured to allow passage of sound around the movable structure in a rest position, and to block at least a portion of the channel in a deflected position. The movable structure moves from the rest position to the deflected position based on receiving, at one of the at least two ends of the channel, a pressure wave having at least a threshold amplitude pressure to block at least a portion of the pressure wave from reaching the other end of the channel.
Claims20
An earplug comprising:
- a body insertable into an ear canal, the body defining a channel having at least two ends;
- and
- a movable structure disposed within the channel and configured to:
- allow passage of sound around the movable structure in a rest position within the channel,
- block at least a portion of the channel in a deflected position within the channel, and
- move from the rest position to the deflected position based on receiving, at one of the at least two ends of the channel, a pressure wave having at least a threshold amplitude pressure.
Dependencies are inferred from the claim text.