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| Number | Title | Issue Date |
| 8028790 | Sound projection device attachable to a user when not in use A megaphone comprises a rigid but bendable material with a tapered shape. When the material is folded, the produced megaphone has a small opening at one end and a larger opening at the other end. The megaphone has edges that form an opening along the side such that ... | 10/04/2011 |
| 7146650 | Ear covers Ear covers and a strap for joining the ear covers. Each ear cover includes an inner cup over the ear, an outer cup over the inner cup. The cups are shaped to define an inner space between them in which an end region of the strap is guided to move lengthwise with res... | 12/12/2006 |
| 6920228 | Lightweight headset for high noise environments A lightweight communications headset includes a headband adapted to be worn on user's head. A speaker housing is carried by the headband and defines an acoustic chamber. A speaker mounted within projects sound waves into the acoustic chamber. The headband carries a ... | 07/19/2005 |
| 6705319 | Miniature acoustical guidance and monitoring system for tube or catheter placement An apparatus and method are disclosed for acoustically guiding a distal end of a tube within a body. An incident sound pulse is generated and propagated down the tube into the body. A plurality of microphones are located in the tube and are positioned to detect puls... | 03/16/2004 |
| 6674870 | Adjustable sound capturing device (MICTUBZ) An adjustable sound capturing device 2 ("MICTUBZ") having a hollow main cylinder 20 open at both ends with a central microphone port 22 defined in the side wall, the microphone port 22 being equipped with an adjustable fastener 30 for seating the head of ... | 01/06/2004 |
| 6160895 | Hearing aid system with acoustical horn A hearing aid system including an electronic hearing aid containing a microphone and having an orifice in one part thereof for transferring sound to the microphone and an acoustically amplifying horn formed with an outwardly flared end defining an inlet o... | 12/12/2000 |
| 5827173 | Prenatal audio communication device A prenatal audio communication device has a receiving chamber which accepts sound waves for transmission through a flexible tube to a megaphone secured against the abdomen of a pregnant woman so as to transfer sound waves from an external source with whic... | 10/27/1998 |
| 4926961 | Hinged acoustical voice tube An acoustical voice tube, comprising an acoustical hollow upper piece and an acoustical hollow lower piece in hinged connection permits voice or sound tube positioning over a large area without changing the sound characteristics.... | 05/22/1990 |
| 4768612 | Fetal communication device A device for allowing for spoken communication between a pregnant woman and her fetus. The device has a speaking tube component connected at one of its ends to a mouthpiece component and at its other end to a stomach-piece, megaphone-type component. The s... | 09/06/1988 |
| 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 |
| 4579193 | Acoustic connector An acoustic connector is shown for coupling two devices. One device is provided with a hub while the other has a cylindrical member which mates with the hub to provide a permanent coupling therebetween. The member is hollow to conduct acoustic signals bet... | 04/01/1986 |
| 4539983 | Respirator speech transmitter A respirator speech transmitter has a projecting tube with a one-way valve at one end and the other end being covered by a baffle having an inner skirt extending around the tube. An outer skirt extends from the tube to surround the inner skirt so that an ... | 09/10/1985 |
| 4537276 | Mask/microphone system for voice actuated control A device for transmitting sound from a speaker in a first area, such as a sterile or clean field, to a second area such as a nonsterile or nonclean field. The device includes a sound conduit having an inlet and an outlet and being of sufficient length to ... | 08/27/1985 |
| 4527657 | Tapered tube impedance matching underwater voice communicator with bubble silencer An underwater voice communicator in which the preferred embodiment comprises a pair of tapered tubes in communication with a diver's mouth. The tubes are constructed of a material having a sound impedance similar to the sound impedance of water. Sound ene... | 07/09/1985 |
| 4473130 | Crash helmet with communication system A crash helmet for use by motorcycle drivers or riders has a rigid shell; a first flexible acoustic tube a first section of which extends into and has a bell horn in the region of the mouth-protecting part of the shell, and a second section extending from... | 09/25/1984 |
| 4451709 | Eye glass hearing aids An eyeglass hearing aid including a channel having a serpentine shape for providing a compact acoustical path for extending the path of sound transmission. A sweat guard is positioned around a volume control aperture formed on the upper surface of the eye... | 05/29/1984 |
| 4442515 | Multiplex transmission medium for application in multiplex vehicle control systems An insulated transmission medium for propagating ultrasonic vibrational waves and conducting electromagnetic energy in a multiplex type communication system, whereby said medium is a metallic strip that interconnects an ultrasonic wave transmitting transd... | 04/10/1984 |
