Matches 51 - 100 out of 107 < 1 2 3 >
Match Document Document Title
5321756 Loudspeaker system with sonically powered drivers and centered feedback loudspeaker connected thereto  
A stereophonic loudspeaker system which includes at least two channel loudspeakers and a centrally located feedback control loudspeaker. Each channel loudspeaker incorporates an electrically driven...
5321388 High efficiency phase and amplitude matched multiple horn electronic siren  
An electronic siren apparatus has a primary horn with a throat which splits into matched secondary horns each having sides, an output end, a longitudinal axis, and a circumference. The secondary...
5301237 Surround sound loudspeakers  
A system for the multichannel reproduction of sound in which a plurality of loudspeakers connectable to a surround sound processor is disclosed. Circuits for adapting the processor to provide left...
5258584 Multiple auxiliary compound driver loudspeaker system  
A compound driver loudspeaker system combines a single exterior radiating loudspeaker with a plurality of internal auxiliary loudspeakers in a cabinet. The cabinet has an external baffleboard and...
5253301 Nondirectional acoustic generator and speaker system  
A nondirectional acoustic generator includes two acoustic generator units which are disposed facing each other as near as possible to the extent that diaphragms thereof do not become in contact...
5243656 Audio circuit  
In a multi-channel audio circuit, a plurality of input signals are supplied to corresponding amplifiers each respectively connected to speakers, at least one of the input signals being inverted....
5233664 Speaker system and method of controlling directivity thereof  
A speaker system including a common input terminal for receiving an audio signal to be acoustically radiated; several speaker units; several digital filters connected between the common input...
5212732 Effects speaker system  
There is disclosed herein a loudspeaker system of the dipole type, particularly for use in surround sound, reverberation and similar applications. An exemplary embodiment of the speaker system...
5210802 Acoustic imaging  
An acoustic imaging device includes a support structure and first and second drivers mounted on first and second faces respectively of the support structure. The first driver projects sound output...
5197103 Low sound loudspeaker system  
A low sound loudspeaker system is constructed of an acoustic pipe extending from the back side of a loudspeaker unit, an air chamber provided at the front side of the loudspeaker unit, and a bass...
5181247 Sound image enhancing  
A speaker system includes a left channel input and a right channel input for receiving left channel and right channel signals respectively, a left channel driver, a right channel driver, an (L-R)...
5173942 Audio system operable in directional and non-directional modes  
An audio system includes a speaker unit having an opening in its front surface supporting a speaker and a diffuser with a reflecting surface detachably attached to the speaker unit and positioned...
5119431 Efficiency loudspeaker  
An improved efficiency loudspeaker that increases the accoustical output of the speaker by increasing its amplitude without increasing the power input to the speaker. This is accomplished by...
5073945 Loudspeaker system  
An improved dipole type characteristic loudspeaker system has a pair of loudspeakers (1 and 2) which are mounted on the front baffle board (4) and the back baffle board (5) of a console (3) and are...
5025473 Hemispherical speaker system  
An arrangement of divergently mounted acoustic transducers in a hemispherical air tight enclosure, the enclosure being sized with regard to the loading requirements of the acoustic transducers to...
4945334 Energizing means for electronic warning apparatus  
According to the invention, a high-powered community alerting and warning device comprising a number of electromagnetic drivers is energized for tone generation by means of a rotary alternator that...
4885782 Single and double symmetric loudspeaker driver configurations  
New loudspeaker driver configurations comprise positioning the high frequency driver between symmetrically located lower frequency drivers and providing in combination electrical or acoustical...
4882760 Sound reproduction system  
A system for reproducing sound, particularly musical sound, giving enhanced pleasure to the listener. The system utilizes a pair of low frequency range speakers, a plurality of high frequency range...
4860363 Loudspeaker system  
The present invention includes a loudspeaker system in which sound radiation axes of two speakers in a single loudspeaker unit form an angle with respect to each other in a horizontal plane to...
4837826 Stereophonic baffle  
A stereophonic baffle comprises a first transducer group (7 to 10) located along a first line and fed by a right signal of a Hi-Fi chain and a second group of transducers (11 and 15) located...
4783820 Loudspeaker unit  
For a good and efficient sound reproduction from a loudspeaker unit it is prescribed that two woofers are arranged back to back, one on a front plate of the unit and the other on an internal...
4704729 Single acoustic box with spatial effect for stereophonic musical reproduction systems  
The single acoustic box with spatial effect for stereophonic musical reproduction systems, according to the invention, consists of an outer shell having at the top a loudspeaker for low-frequency...
4638505 Optimized low frequency response of loudspeaker systems having main and sub-speakers  
A loudspeaker system for use with a stereo system having right R and left L signal outputs, has a right main speaker and right sub-speaker, and a left main speaker and left sub-speaker....
4624337 Speaker enclosure  
This speaker enclosure is of such design and structure, as to increase the input handling of speakers, enabling speakers rated at forty watts maximum handling, for example, to handle approximately...
4596034 Sound reproduction system and method  
A sound reproduction system wherein two full range driver sets are employed to produce out-of-phase sound pressure lobes directed to either side of a listening area whereby the listening area is...
4528691 Alternating variable delay control arrangement and method for push-pull audio transducers  
A control system is provided with an alternating variable delay control arrangement for the control of a push-pull transducer system from an audio input signal source to achieve improved...
4503553 Loudspeaker system  
The disclosure relates to an audio signal reproduction system having one or more of the following features: (1) a loudspeaker having (a) a flat frequency response and (b) a predetermined power...
4472605 Electrodynamic loudspeaker for low and medium sound frequencies  
An electrodynamic loudspeaker radiates sound in all directions and with a high output for a low and medium sound frequencies. It comprises two hemispherical movable diaphragms which are arranged on...
RE31679 Loudspeaker enclosure with acoustical compliance resonating with port mass at frequency below system resonance  
A multiple driver loudspeaker system comprises two angularly spaced rear rectangular baffles each nearly filled with four closely spaced full-range small loudspeakers with a port tube passing...
4464785 Loudspeaker system  
A loudspeaker system includes at least one electromagnetic loudspeaker assembly having a single vibratory coil form to which a vibratory diaphragm is attached. Two or more voice coils are wound on...
4326099 Low frequency cabinet, in particular for a triphonic audio network  
The present invention covers a low frequency acoustic cabinet. The cabinet contains two enclosures holding at least one low frequency loud-speaker so that the front face of each loud-speaker...
4268719 Loudspeaker arrangements  
The invention relates to a loudspeaker housing having a front wall and a back wall and at least two similar electroacoustic transducers. Objects of the invention are to create a loudspeaker having...
4249037 Pyramid loudspeakers with twin cross-phased mid-range speakers  
A truncated, open top, pyramid housing is provided containing a downwardly propagating woofer mounted near the base of the pyramid; a forwardly and slightly upwardly propagating tweeter mounted on...
4213008 Loudspeaker enclosure for mid-wall location  
A loudspeaker enclosure comprising a cabinet to be located adjacent to a wall and having a horn contained therein driven by two loudspeakers oriented at right angles to the axis of the throat...
4182931 360 Degree speakers  
A 360 degree, in-phase audio propagation system utilizating sound propagation in conjunction with various types of active reflectors. In a first embodiment two bass speakers or woofers are mounted...
4146744 Low Q multiple in phase high compliance driver ported loudspeaker enclosure  
A multiple driver loudspeaker system comprises two angularly spaced rear rectangular baffles each nearly filled with four closely spaced full-range small loudspeakers with a port tube passing...
4146745 Loudspeaker enclosure with multiple acoustically isolated drivers and a common port  
A multiple driver loudspeaker system comprises two angularly spaced rear rectangular baffles each nearly filled with four closely spaced full-range small loudspeakers with a port tube passing...
4016953 Push-pull transducer system  
A push-pull transducer system is provided for the reproduction of high fidelity sound to be used with amplifiers or receivers of high quality. The system consists of connecting two loudspeakers of...
4015089 Linear phase response multi-way speaker system  
A multi-way speaker system comprising a tweeter, a squawker and a woofer wherein each of the speakers is arranged in staggered relation along their radiating axis at a predetermined spacing from...
4008374 Loudspeaker systems  
A bass unit for a loudspeaker system which has a pair of loudspeakers mounted one behind the other in a casing to define a chamber of air therebetween. The loudspeakers are operated in phase with...
3984635 Low range loudspeaker system  
An audio speaker system that provides enhanced fidelity of sound reproduction in the bass acoustic frequency range, by comprising a usual driven primary radiator, a pair of conductors for...
3983333 Loud speaker system  
A room audio speaker system for use in combination with at least one room boundary surface, the speaker comprising an enclosure having a closed end wall for placement closely adjacent the room...
3944941 Switching circuit for use with balanced transformerless amplifier  
An output circuit for balanced amplifiers connected to one terminal of each of two loudspeakers with the other terminal of each loudspeaker connected together to the arm of a double-throw switch to...
3924072 Headphone with cross feeding ambience control  
A stereophonic headphone includes ambience control potentiometers connected in series with each audio transducer. A portion of the audio signal applied directly to each audio transducer is coupled...
3818138 BARREL SHAPED SPEAKER ENCLOSURE  
Speaker enclosure having a general barrel-shaped profile containing a plurality of loudspeakers. Two embodiments are shown, one of which utilizes a plurality of full range loudspeakers, the second...
3790712 ELECTRONIC STETHOSCOPE SYSTEM  
A method and apparatus for the detection of heart sounds and fidelity reproduction for diagnostic purposes including a pick-up or sensing device which has an annular projection forming a pick-up...
3688864 INFINITE DYNAMIC DAMPING LOUDSPEAKER SYSTEMS  
An infinite dynamic damping loudspeaker system includes at least two similar loudspeakers which radiate from an enclosure in response to the simultaneous receipt of the same signals. The diaphragms...
3608665 SOUND-REPRODUCING STRUCTURE  
A sound-reproducing structure wherein one or more loudspeakers are mounted on baffle means within a baffle housing to direct the sound (a) from the speaker, directly, forwardly outwardly through...
3582553 LOUDSPEAKER SYSTEM  
A loudspeaker system comprises two angularly displaced rear rectangular baffles each nearly filled with four closely spaced full-range small loudspeakers and partially enclosing a substantially...
3477540 SPEAKER SYSTEM  
Matches 51 - 100 out of 107 < 1 2 3 >