A headphone supported at the ear position for reproducing sound comprises (a) an oscillating member for sound reproduction, (b) a frame to support the oscillating member, (c) at least one opening constituting a path from the space, defined by the inside of the oscillating member, an ear pad and the ear to the free space on the outside of the oscillating member, and (d) an acoustic resistance member disposed in the opening.

An audiometric headset having a transducer mounting and sound insulation system which closely couples the transducer to the ear. The headset is comprised of a pair of domes having a soft foam liner and soft sponge sound-absorbent material surrounding a floating sound transducer mounted in an open side of the case. The sound transducer is mounted in a socket of a circular resilient hub supported on a resilient flange by a pair of resilient strips providing a semi-circular opening between the inte...

The headphone includes a cup-shaped case forming the coupling space and this cup-shaped case, in use, engages the user's head and encloses the user's ear. At least one electroacoustic transducer is included in the cup-shaped case, and the case either is designed as an acoustic frictional resistance or as a supporting structure of such a resistance. The headphone is equipped with acoustic and/or electrical systems compensating the drop at the low frequencies, and there are no reflecting surfaces ...

The present invention describes a head phone unit having a speaker frame, speaker case, and a case retention band wherein the parts of the unit are retained in assembled relationship by a fastening pin which also affixes the unit to a head band assembly. This construction enables more efficient assembly methods due to the reduced number of parts and, consequently, reduces the unit cost and the percentage of defective units produced.

A headphone set held over the ears by a band worn on the head of a user comprises a sound box surrounding each ear and mounting in its front, an electro-acoustic transducer. This electro-acoustic transducer has its axis inclined by a small angle from the vertical to a line connecting each ear.

The invention relates to an ear protecting device of the kind comprising two shells intended to be placed over the ears to be protected and interconnected by a resilient holder means or yoke to which the shells are secured in a manner permitting adjusting their position to the individual shape of the head of the user. Each shell contains an absorber for standing sound waves and an annular soft sealing pad bearing against the head of the user around the ear. In order to give the pad required rigi...

A headset includes a body comprising a chin portion extending to enlarged ear portions. Each ear portion includes an earpad receiving opening defined by an annular rim. An earpad is mounted in each earpad receiving opening of the headset body and comprises an ear engaging layer extending to a cylindrical ear surrounding portion which encloses an annular cushioning member. Each earpad further comprises a retaining portion which encloses an annular retaining member formed from a relatively rigid m...

A golf putting practice device has an elongate runner for supporting a rolling golf ball from a putting location at one end of the runner to a cup formed in the other end of the runner. An overshoot gutter is provided adjacent and beyond the cup and the cup and the gutter are connected in communication with a ball return structure by way of a ramp structure which guides golf balls to the ball return device. The ball return device includes a track which extends alongside the runner to the putting...

An electroacoustic sound generator of the type having a diaphragm vibrating in the audio frequency range is described. The diaphragm is mounted in a housing which is constructed to form first and second volumes, the former being smaller than the latter. The housing has channels formed therein for communicating sonic energy to the exterior from the first interior volume portion. The first volume portion together with the channels form a Helmholtz resonator tuned to the frequency of the sonic ener...

A telephone ear piece lock is disclosed to prevent unauthorized use of a protected telephone instrument. The ear piece lock includes a rim mounting bracket that is permanently affixed near the receiver end of the telephone and has a flat arm radially outwardly extending therefrom. The arm is provided with a transverse slot for instrument locking purposes. A disc-like cover overfits the receiver end to function as a sound barrier when tightly held over the receiver end. A bent locking finger exte...