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| Number | Title | Issue Date |
| 5257318 | Earphone spacer with electronically variable sound level A spacing device which holds earphones away from the ears to create a sense of live music when the earphones are used in conjunction with loudspeakers. The spacers allow sound from loudspeakers set away from the user to reach the ear from all directions. ... | 10/26/1993 |
| 5251326 | Two way communication system for water sports A system for two way communication under shallow water or between a swimmer and observer comprising a transceiver, a wire for conducting electrical signals connected to the transceiver, a watertight transducer housing that curvedly conforms to human heads... | 10/05/1993 |
| 5022486 | Sound reproducing apparatus A sound reproducing apparatus is provided formed of an acoustic tube having first and second opposite ends, and having substantially a same inside diameter as that of an external acoustic meatus of the user who is wearing the sound reproducing apparatus. ... | 06/11/1991 |
| 4975967 | Earplug for noise protected communication between the user of the earplug and surroundings The earplug inserted in the auditory canal is so designed that its inside end facing the tympanic membrane makes close contact with the surrounding hard bone structure, and its external end at the aperture of the auditory canal makes close contact with th... | 12/04/1990 |
| 4864610 | Earpiece for a telephone headset An earpiece for use with a post-auricle communication headset is disclosed. The headset includes a capsule to which a microphone boom and the earpiece are affixed. The earpiece is composed of a flexible sound tube terminating in a sound tip surrounded by ... | 09/05/1989 |
| 4702345 | Hearing aid retention device In a hearing aid of the type, including a battery containing housing supported rearwardly of the ear auricle by an elongated tube joining one end of the housing to an ear opening contained ear molding, an endless flexible ring surrounds the ear auricle at... | 10/27/1987 |
| 4683587 | Submersible personal stereo Submersible personal stereo using a source, such as a radio, of stereo signals, a pair of sealed chambers housing a pair of electro-acoustic transducer and acoustic transmissive tubing for transmitting sound from the chambers to ear plugs, the tubing bein... | 07/28/1987 |
| 4677679 | Insert earphones for audiometry Insert earphones, which are especially useful for audiometry applications include a transducer which is coupled to a resonance cancellation tube as well as to a main tube which is coupled to the ear, with series acoustic dampers in the tubes, operating in... | 06/30/1987 |
| 4649570 | Headset receiver cartridge and earphone case therefor A headset receiver comprises a cartridge (10) containing all electronic receiving functional parts, and a passive case (32) which serves a protective envelope for the cartridge while conducting sound from the cartridge through acoustical stems (52) to a l... | 03/10/1987 |
| 4588868 | Headset An over-the-head style headset to be used in the airline industry and supplied to passengers in flight to provide audio reception of one or more programs. The headset is designed to be snap-assembled from economically manufactured parts, and is capable of... | 05/13/1986 |
| 4565258 | Stereo headset system for use in a wet environment The present invention is a stereo headset system for use with a stereo headset device and a stereo sound system. The stereo headset device is of the stethoscope type and has a pair of sound tubular mains. A coupling plug is mechanically and acoustically c... | 01/21/1986 |
| 4554993 | Inflight headset for civil aircraft The present invention relates to an inflight headset for civil aircraft and in particular to one comprising a pair of main body portions each having a cylindrical member formed integrally therewith, a pair of covers each connected to one of the main body ... | 11/26/1985 |
| 4456797 | Submersible personal stereo system A waterproof pouch to house a personal stereo cassette tape player or radio electrically connected by means of a retractile cable to a pair of waterproof headphones. The waterproof pouch has a closure enabling the pouch to repeatedly be hermetically seale... | 06/26/1984 |
| 4347405 | Sound reproducing systems utilizing acoustic processing unit A system for reproducing a plurality of electro-acoustic signals each corresponding, for example, to a channel signal of a multichannel electronic keyboard instrument, includes an acoustic processing unit which comprises a plurality of electro-acoustic tr... | 08/31/1982 |
| 4297535 | Stereo headset A stereophonic headphone having a pair of earpieces, each having associated electro-acoustic main transducers and sound chambers. Each of the sound chambers are coupled acoustically to at least one first sound tube serving to transmit a portion of the sou... | 10/27/1981 |
| 4289938 | Voice amplification apparatus Voice amplification apparatus for use by persons whose normal speech processes have been damaged or impaired. The apparatus includes a microphone unit which is electrically connectable to an amplifier unit and means for enabling the unit to be supported s... | 09/15/1981 |
| 4173715 | Acoustical device An acoustical device for the reception of sound such as music by humans. The device includes a stereo headset having an acoustic passage and terminal earphones at each end of the headset. The headset is mountable on the head of a human so that the termina... | 11/06/1979 |
| 4110583 | Earphone construction In an earphone construction an axially extending tubular shaped member forms a passageway or listening channel with an ear opening located between the ends of the member. A sound source is positioned in the passageway, spaced from the ear opening, for dir... | 08/29/1978 |
| 4055233 | Ear coupler A self-forming ear plug element for use with a stethoscope type sound tube installation for transmitting audio sound to the ear and rejecting ambient noise. A conical portion having a sound-transmitting orifice enters the ear. A thin radially extensive sh... | 10/25/1977 |
| 4006796 | Earpiece which substantially consists of a thin-walled flexible capsule filled with a liquid medium An earpiece which takes the form of a pouch made of a plastics foil which surrounds a less pliant plastics tube in an airtight manner and is filled with a sluggishly moving jelly-like paste. A not readily movable compression ring provided with a funnel shaped ... | 02/08/1977 |
| 4006321 | Transducer coupling system A transmission system is disclosed having an improved means for coupling sound to and from a transducer. The system includes a main sound channel and an associated cavity; damping elements are selectively positioned in or adjacent the cavity to provide a ... | 02/01/1977 |
| 3939310 | Stereophonic headset with ear to ear acoustical passageway A stereophonic headset with an enclosed, ear to ear acoustical passageway is provided so that each of the wearer's and listener's ears can hear the output of both headset stereophonic speakers.... | 02/17/1976 |
