A sound receiver head set or ear phone includes an ear piece housing of generally semi-spherical shape having an annular padded edge which is adapted to be located against the head of a user around the ear. The housing defines a guide for a transducer system which has an acoustic inlet which may be oriented at a selected location in respect to the auditory meatus of the wearer. The housing carries adjusting means for regulating the position of the transducer and the acoustic outlet so that it is...

A headphone which is usable particularly along with a plurality of other headphones includes a transducer which is connected through a switch to the source of current. The switch provides a means for automatically turning the transducer either on or off. In one embodiment the switch includes a mercury switch which when oriented in an inactive or nonoperative position, ensures that the transducer is turned off and in another position in which operation normally takes place, will ensure that the t...

A device for protecting the ears from loud sounds while enabling low-level voice frequency sounds to be discerned. A microphone is positioned on the outside of an insulated ear protector and a sound reproducer positioned within the protector. The sound picked up by the microphone is subjected to audio amplitude compression and voice frequency bandpass filtering before being converted back to sound.

The present invention provides an audio seal for use in an ear cup assembly. The audio seal has a generally torus-shaped body made from a compressible material. The torus-shaped body has a generally elliptical, torus configuration over approximately two-thirds to three-quarters of its perimeter and has a head and neck pad section that covers approximately one-quarter to one-third of said body's perimeter. The head and neck pad section protrudes forwardly and radially outward to form a bulging se...

An earphone comprises a housing including a partition plate with an opening containing a diaphragm. An annular cushion is secured to the periphery of the partition and engages around the wearer's ear to form a coupling space between the diaphragm and the ear. A back covering is connected to the partition defining a soundproof cavity between the partition and the back covering. A partial wall is spaced from the partition on a side opposite the diaphragm to define a first high restoring force cavi...

An inertial-reaction microphone transducer mounting supported on the wearer's head away from the mouth for transmitting speech to the exclusion of ambient. A compliant, radial array of elastomer supporting material presses the transducer gently to the head. The transducer and supporting array may be mounted in a cup covering one ear, or it may be mounted in a capsule having an acoustical labyrinth frequency-selective vent for the neutralization of noise.

Headphone earpieces which comprise each at least one electroacoustic transducer operating on the orthodynamic principle and including a small-mass diaphragm of an extension corresponding at least to that of an average auricle, with the coupling space of each of the earpieces being designed for a minimum reflection, are equipped with an ear cushion which, with the headphone in position of use, tightly encloses the coupling space toward the outside. The disadvantages of headphone with an orthodyna...

A sound attenuating earcup assembly having ambient communication capability without the necessity of removing the assembly in which a cup or shell adapted to fit over the wearer's ear is made of a relatively hard sound attenuating material and is formed with three wall openings each extending from the outer surface of the shell to the interior and each of which is provided with an external countersink. The first opening receives the battery casing having an externally removable cover which holds...

A double hearing protection system comprises a circumaural hearing protector that covers and encircles the pinnae and an earplug device that is inserted into the ear canal. The earplug portion of the system comprises a tether that is coupled to the interior of a circumaural hearing protector. The tether retracts into the earcup when both the earplug and circumaural hearing protector are worn, ensuring that the earseal against the head is not broken by the retractable tether.

The invention relates to an arrangement for improving leak tolerance in an earpiece. The invention can be applied preferably in teleterminals, particularly in mobile stations. One idea of the invention is that an acoustic return path (314, 313, 311, 312, 320) is directed from the back part of the earpiece capsule (301) to a volume (307) between the earpiece (300) and the user's ear. By means of the solution according to the invention an optimum, controlled load is achieved particularly for low f...