Earmuffs with a joint are provided to create a biased pressure distribution about a perimeter of the cup. The earmuffs may include a pivot joint. The pressure distribution creates a wedging pressure (e.g., on a top edge) on the cups that hold the earmuffs on the user's head, for example, when the user rotates the headband behind the head. The bias pressure is also used to adjust the seal formed between the pad and the user's head. Adjustments to the moment created by separating the joints from the cup's apex enable a user to selectively adjust the seal according to the user's preference. A cam is added to the headband to change the hoop stress distributed at the joints and further adjust the compressive forces generated to hold the earmuffs against the user's head.

Mitten and ear compression apparatus including a compression band having a substantially circular shape. The compression band can have a circumferential length and a compression band operably coupled with at least one-half () of the circumferential length of the compression band. The compression band can be coupled with less than nineteen-twentieths ( 19/20) of the circumferential length of the compression band, thereby forming a front portion of the circumferential length not having a compression band coupled therewith.

Mitten and ear compression apparatus including a compression band having a substantially circular shape. The compression band can have a circumferential length and a compression band operably coupled with at least one-half () of the circumferential length of the compression band. The compression band can be coupled with less than nineteen-twentieths ( 19/20) of the circumferential length of the compression band, thereby forming a front portion of the circumferential length not having a compression band coupled therewith.

Hearing protection device (10, 10, 10) with an indication unit (40a, 40b) and a detection unit (30, 30, 30) to send a first detection signal, to assign a distance value based on a second detection signal of an external device (50, 50) representing the physical distance to the external device (50, 50) and to control the indication unit (40a, 40b) to provide an indication to the user (100) if the assigned distance value is at or below a predetermined threshold distance value. Thus, a collision may easily and reliably be prevented by providing an indication to the user (100), so that the risk of missing relevant sound of a moving person or object is overcome. A collision warning system comprising such a hearing protection device (10, 10, 10) and an external device is also provided. Furthermore, a method of retrofitting a hearing protection device (10) with such a detection unit (30, 30, 30) is provided.

Hearing protection device (10, 10, 10) with an indication unit (40a, 40b) and a detection unit (30, 30, 30) to send a first detection signal, to assign a distance value based on a second detection signal of an external device (50, 50) representing the physical distance to the external device (50, 50) and to control the indication unit (40a, 40b) to provide an indication to the user (100) if the assigned distance value is at or below a predetermined threshold distance value. Thus, a collision may easily and reliably be prevented by providing an indication to the user (100), so that the risk of missing relevant sound of a moving person or object is overcome. A collision warning system comprising such a hearing protection device (10, 10, 10) and an external device is also provided. Furthermore, a method of retrofitting a hearing protection device (10) with such a detection unit (30, 30, 30) is provided.

A supporting unit includes a first part, a second part, and an adjusting module. The first part includes a first connecting member and a supporting member. The supporting member is detachably connected to the first connecting member. The first connecting member is rotatably connected to the second part. The adjusting module is disposed in the first part and the second part. The adjusting module includes a rod body, a friction component, and an adjusting member. The rod body is connected to the second part. The friction component is movably connected to the rod body and is located between the first connecting member and the adjusting member. The first part generates a frictional force with the second part through the adjusting module. The adjusting member is movably connected to the rod body to adjust the frictional force.

A supporting unit includes a first part, a second part, and an adjusting module. The first part includes a first connecting member and a supporting member. The supporting member is detachably connected to the first connecting member. The first connecting member is rotatably connected to the second part. The adjusting module is disposed in the first part and the second part. The adjusting module includes a rod body, a friction component, and an adjusting member. The rod body is connected to the second part. The friction component is movably connected to the rod body and is located between the first connecting member and the adjusting member. The first part generates a frictional force with the second part through the adjusting module. The adjusting member is movably connected to the rod body to adjust the frictional force.

The present disclosure relates to a hearing protection device (10, 10, 10) with an indication unit (40a, 40b) and a detection unit (30, 30, 30) to send a first detection signal, to assign a distance value based on a second detection signal of an external device (50, 50) representing the physical distance to the external device (50, 50) and to control the indication unit (40a, 40b) to provide an indication to the user (100) if the assigned distance value is at or below a predetermined threshold distance value. Thus, a collision may easily and reliably be prevented by providing an indication to the user (100), so that the risk of missing relevant sound of a moving person or object is overcome. A collision warning system comprising such a hearing protection device (10, 10, 10) and an external device is also provided. Furthermore, a method of retrofitting a hearing protection device (10) with such a detection unit (30, 30, 30) is provided.

The present disclosure relates to a hearing protection device (10, 10, 10) with an indication unit (40a, 40b) and a detection unit (30, 30, 30) to send a first detection signal, to assign a distance value based on a second detection signal of an external device (50, 50) representing the physical distance to the external device (50, 50) and to control the indication unit (40a, 40b) to provide an indication to the user (100) if the assigned distance value is at or below a predetermined threshold distance value. Thus, a collision may easily and reliably be prevented by providing an indication to the user (100), so that the risk of missing relevant sound of a moving person or object is overcome. A collision warning system comprising such a hearing protection device (10, 10, 10) and an external device is also provided. Furthermore, a method of retrofitting a hearing protection device (10) with such a detection unit (30, 30, 30) is provided.