Abrégé

An acoustic filter (100) comprises a filter housing (10) with an acoustic channel (11) and acoustic valve (20) in the channel. The acoustic valve (20) can be moved to along a trajectory (S) between positions (P1, P2). An actuator (30) is configured to actuate the acoustic valve (20) along the trajectory (S). The actuator (30) comprises one or more mechanical elements (31,32). The mechanical elements can move the acoustic valve (20) along at least an initial part of the trajectory. The actuator (30) comprises one or more magnetic elements (41, 42) with a magnetic field (M1,M2) configured to exert a magnetic force (Fm) on the acoustic valve (20). This may help to move the acoustic valve (20) to the second position (P2) along a final part of the trajectory and keep the acoustic valve (20) at the second position (P2). Accordingly the stroke of the valve can be enhanced.

Classes IPC  ?

• H04R 25/00 - Appareils pour sourds

Abrégé

NNN10N123NNN1,2231223NN) of the sound in decibels.

Classes IPC  ?

• A61F 11/08 - Dispositifs de protection pour les oreilles internes, p. ex. tampons auriculaires

Abrégé

An earplug (100) and method for attenuating sound (S). An acoustic canal (20) extends straight through a housing (10) to guide the sound (S) inside an ear canal. The acoustic canal (20) comprises a canal section (21) dimensioned to fit at least partially inside the ear canal. The canal section (21) ends at one side in a first exterior opening (21a) to let the sound (S) into the ear canal. Another side of the canal section (21) transitions into a first resonance volume (22) with a relatively wide diameter (A2). A second resonance volume (23) ends at one side in a second exterior opening (23a) and, the other side being separated from the first resonance volume (22) by a sound attenuating mesh (14). This provides resonance cavities (Cl,C2) that compensate attenuation of the mesh (14) over a wide range of high frequencies (Fr).

Classes IPC  ?

• A61F 11/08 - Dispositifs de protection pour les oreilles internes, p. ex. tampons auriculaires

Abrégé

An injection moulded acoustic filter (10) comprising a foil piece (11) or filter structure having a plurality of micro-slits (12) configured to act as acoustic channels through the foil piece (11) for filtering sound waves (S1) impinging the foil piece (11). The micro-slits (13) have a maximum slit width (Ws) across a surface of the foil piece (11) of less than one hundred micrometres and a combined slit length along the surface of the foil piece (11) of at least five millimetres. An earplug (100) comprising the acoustic filter (10). A method and mould (20) for manufacturing the acoustic filter (10).

Classes IPC  ?

• A61F 11/08 - Dispositifs de protection pour les oreilles internes, p. ex. tampons auriculaires

Abrégé

c); measuring the acoustic signal (Sr) from the ear canal (31); comparing the measured signal (Sm) with a reference signal (Se); and providing a feedback signal (Sf) based on the said comparison. The feedback signal (Sf) is a measure for the mold shape quality (Q) of the custom ear mold (2).

Classes IPC  ?

• H04R 25/00 - Appareils pour sourds

Abrégé

The present disclosure concerns an acoustic valve (10) for hearing protection. The valve (10) comprises a housing (1) that is placeable or integrated in an ear plug (100). The housing (1) comprises a sound passage (2) extending through the housing (1) for allowing at least partial transmission of sound from the external surroundings (11) into the auditory canal (13). The housing comprises an impulse filter (3) comprising a rigid plate (4). The rigid plate (4) forms an enclosed volume (12) within the sound passage (2) of the valve. The rigid plate (4) comprises at least one perforation (5) for passing part of the sound from the external surroundings (11) via the perforation (5) into the enclosed volume (12). The housing further comprises an acoustic filter (6) comprising a mesh (7) arranged in the sound passage (2) between the rigid plate (4) and the auditory canal (13).

Classes IPC  ?

• A61F 11/08 - Dispositifs de protection pour les oreilles internes, p. ex. tampons auriculaires

Abrégé

The present disclosure concerns a method for determining a mould shape quality (Q) of an ear mould (2) customized to an ear canal (31) of a user by means of a mould testing system (100). The mould testing system (100) comprises an acoustic generator (3) and a microphone (4) arranged in a test housing (1) with an open end (1c) that is connectable to an inner passage (2c) of the custom ear mould (2). The method comprises inserting the ear mould (2) into the ear canal (31); connecting the test housing (1) to the ear mould (2); generating an acoustic signal (Sg) into the ear canal (31) via the inner passage (2c); measuring the acoustic signal (Sr) from the ear canal (31); comparing the measured signal (Sm) with a reference signal (Se); and providing a feedback signal (Sf) based on the said comparison. The feedback signal (Sf) is a measure for the mould shape quality (Q) of the custom ear mould (2).

Classes IPC  ?

• H04R 25/00 - Appareils pour sourds

Abrégé

There is provided an audio listening device comprising a housing, shaped to substantially form a pressure seal between an auditory canal of an ear and an external surroundings. A pressure relay channel in the housing is arranged for relaying a pressure difference between the auditory canal and the external surroundings. A pressure valve in the pressure relay channel is arranged for switching between an open or closed position for allowing or preventing, respectively, an exchange of pressure. An acoustic generator between the pressure valve and the auditory canal is arranged for generating an acoustic signal into the auditory canal. A pressure sensor is arranged for measuring an internal pressure level in the auditory canal and control logic is arranged for controlling an actuator to switch the pressure valve to an open position when the measured internal pressure level is above a threshold pressure level.

Classes IPC  ?

• H04R 1/10 - ÉcouteursLeurs fixations

Abrégé

An ear protector (1) with a sound damping filter (3), comprises a membrane (5). The membrane is composed of a material that permits the transmission of air and water vapor with respect to the ear from the into the outside of the ear protector, the membrane is pre stressed mounted in the filter, enabling a bigger surface and hence bigger air and water transport at same sound attenuation.

Classes IPC  ?

• A61F 11/06 - Dispositifs de protection pour les oreilles
• H04R 1/10 - ÉcouteursLeurs fixations
• H04R 25/00 - Appareils pour sourds

Abrégé

An ear protector (1) with a sound damping filter (3), comprises a membrane (5). The membrane is composed of a material that permits the transmission of air and water vapour with respect to the ear from the into the outside of the ear protector, the membrane is pre stressed mounted in the filter, enabling a bigger surface and hence bigger air and water transport at same sound attenuation.

Classes IPC  ?

• A61F 11/08 - Dispositifs de protection pour les oreilles internes, p. ex. tampons auriculaires

Abrégé

An ear protector with an acoustic damping filter (3) for hearing protection, comprises at least one acoustic element (5) being exchangeable mounted in the filter and defining an acoustic channel extending from one side of the filter through the at least one acoustic element to the other side. The filter (3) is adapted to mount a number of interchangeable acoustic elements (5), the acoustic damping characteristics of the filter (3) can be adapted by mounting acoustic elements with different damping parameters.

Classes IPC  ?

• A61F 11/08 - Dispositifs de protection pour les oreilles internes, p. ex. tampons auriculaires

Abrégé

An earplug is described for insertion in an auditory duct. The earplug includes a loudspeaker for connection to a playback device. When inserted in a user's ear, the loudspeaker is in acoustic communication with the ear's canal. A transmitter is provided that transmits ambient sound to the ear canal with an adjustable damping level. A regulating unit regulates a damping level depending on detection of control signals to the loudspeaker. When the user does not listen to, for instance, music of the playback device, the user can simply observe ambient sounds without removing the earplug from the ear.

Classes IPC  ?

• H04R 1/10 - ÉcouteursLeurs fixations