Proposed is an earplug that can effectively reduce high-frequency noise using a metasurface. The high-frequency noise filtering earplug using a metasurface according to an embodiment of the present disclosure may include an eartip with an internal passage, an interference attenuation module having a damping passage for reducing noise and a first reflective cavity that is connected to the damping passage and reflects incident sound waves and transmits the sound waves to the damping passage, and a connecting tube installed between the eartip and the interference attenuation module to connect the internal passage and the damping passage to each other.

Proposed is an earplug that can effectively reduce high-frequency noise using a metasurface. The high-frequency noise filtering earplug using a metasurface according to an embodiment of the present disclosure may include an eartip with an internal passage, an interference attenuation module having a damping passage for reducing noise and a first reflective cavity that is connected to the damping passage and reflects incident sound waves and transmits the sound waves to the damping passage, and a connecting tube installed between the eartip and the interference attenuation module to connect the internal passage and the damping passage to each other.

An earplug dispenser for contactless operation by a user having a container portion for receiving a plurality of earplugs. A dispensing portion is coupled to the container portion. The dispensing portion has a motor and a rotor coupled to the motor. The rotor has a plurality of rotor openings to receive individual earplugs in each rotor opening. The dispensing portion also has a dispensing opening. The motor rotates the rotor to dispense earplugs through the dispensing opening.

An earplug dispenser for contactless operation by a user having a container portion for receiving a plurality of earplugs. A dispensing portion is coupled to the container portion. The dispensing portion has a motor and a rotor coupled to the motor. The rotor has a plurality of rotor openings to receive individual earplugs in each rotor opening. The dispensing portion also has a dispensing opening. The motor rotates the rotor to dispense earplugs through the dispensing opening.

The present invention relates to an adjustable hearing protection device for arranging in and/or on the ear, the hearing protection device including: a housing with an acoustic entrance opening, an insertion part for inserting into an auditory canal of the ear extending from the housing with an acoustic exit opening oriented toward the interior of the auditory canal, and adjusting means for adjusting the hearing protection device to one of at least two acoustic adjustment positions. Each acoustic adjustment position sets one of a number of acoustic couplings between the entrance opening and the exit opening.

The present invention relates to an adjustable hearing protection device for arranging in and/or on the ear, the hearing protection device including: a housing with an acoustic entrance opening, an insertion part for inserting into an auditory canal of the ear extending from the housing with an acoustic exit opening oriented toward the interior of the auditory canal, and adjusting means for adjusting the hearing protection device to one of at least two acoustic adjustment positions. Each acoustic adjustment position sets one of a number of acoustic couplings between the entrance opening and the exit opening.

There is provided a system for estimating a total acoustic attenuation of a hearing protection device including an interface at a distal end and a sound canal extending from the interface to a sound opening at a medial end of the hearing protection device. The system comprises: a measurement unit including a loudspeaker and a microphone and being attachable to the interface in such a manner that, when the hearing protection device is worn in an ear canal of a user, the loudspeaker and the microphone are in acoustic communication, via the sound canal of the hearing protection device; a control unit configured to provide the loudspeaker with test audio signals to generate test sounds in the occluded ear canal volume and to receive test response audio signals captured by the microphone from the test sounds; and an evaluation unit configured to estimate a leakage acoustic impedance.

A modular therapeutic eye mask is an apparatus that is used to help the user to sleep naturally and comfortably while receiving various therapeutic benefits. To do so, the apparatus includes a mask body, a support band, and a plurality of therapeutic inserts. The mask body is designed to be comfortably worn around the user's eyes to completely block any light from the surroundings. The mask body is also designed to retain the plurality of therapeutic inserts as well as other mask accessories that help the user to naturally sleep. The support band is designed to comfortably position the mask body and the plurality of therapeutic inserts retained within the mask body against the user's face. The plurality of therapeutic inserts includes several therapeutic inserts that provide various therapeutical benefits when at least one therapeutic insert is used with the mask body while the user is resting.

In accordance the present invention, a method, apparatus and computer program for monitoring air pressure change are provided that may include receiving a user input selecting a pressure monitoring application, receiving a user input initiating monitoring of an ambient air pressure by the pressure monitoring application, determining a first barometric pressure of the ambient air pressure at a first time, determining a second barometric pressure of the ambient air pressure at a second time, wherein the second time is a predetermined time interval from the first time, comparing the first barometric pressure with the second barometric pressure to determine a first absolute rate of change of the ambient air pressure over the predetermined time interval, and providing an indication to employ protective measures when the first absolute rate of change of the ambient air pressure is equal to or a exceeds a threshold rate of change likely to cause barotrauma.

In accordance the present invention, a method, apparatus and computer program for monitoring air pressure change are provided that may include receiving a user input selecting a pressure monitoring application, receiving a user input initiating monitoring of an ambient air pressure by the pressure monitoring application, determining a first barometric pressure of the ambient air pressure at a first time, determining a second barometric pressure of the ambient air pressure at a second time, wherein the second time is a predetermined time interval from the first time, comparing the first barometric pressure with the second barometric pressure to determine a first absolute rate of change of the ambient air pressure over the predetermined time interval, and providing an indication to employ protective measures when the first absolute rate of change of the ambient air pressure is equal to or a exceeds a threshold rate of change likely to cause barotrauma.