Meyer Sound Laboratories, Incorporated

Pablo Espinosa

Paul Bunning

Jon M Arneson

Michael Schneider

Katrin M Rawks

John D Meyer

Paul J Kohut

John McGhee

Richard D Herr

Perrin Meyer

Alejandro Garcia Rubio

Jean Pierre Mamin

Peter Kowalczyk

Loudspeaker

An arrayable loudspeaker () has at least one high frequency driver () mounted to a horn () and at least one pair of low frequency drivers () configured behind and in a closely spaced relationship to the horn to form low frequency side chambers () between the drivers and the horn from which acoustic energy produced by the low frequency drivers can propagate. Low frequency exit channels () above and below the horn are coupled to the low frequency side chambers (). The configuration of the horn and low frequency drivers and the low frequency side chambers and low frequency exit channels is such that acoustical outputs of all drivers radiate coaxially from the loudspeaker with substantially constant wide beamwidth in the non-arraying plane. Signal processing can be added to enhance beamwidth control critical frequency ranges above crossover.

Arrayable loudspeaker with constant wide beamwidth

Arrayable loudspeaker

A loudspeaker rigging system having upwardly extending connecting links comprises splay adjustment and pivot links slidingly disposed in splay adjustment and pivot link stowing channels in a frame structure for the sides of a loudspeaker in a stack of loudspeakers, the splay adjustment and pivot links upwardly movable from stowed to linking positions, in the linking position the splay adjustment and pivot links linkable with locking pin holes in the bottom of the frame structure of a superjacent loudspeaker, the splay adjustment link having a plurality of splay angle slots of various lengths, the splay angle slots aligned with a plurality of splay angle selection pin holes in the frame structure, such that upon insertion of a linking pin in a selected splay angle selection pin hole and corresponding aligned splay angle slot the splay angle link may be raised upward to a selected splay angle.

Loudspeaker rigging system having upwardly extending connecting links

An improved filtering system for loudspeaker equalization is comprised of two filtering sections, a single pole filtering section having single pole filters for shaping the frequency response of the audio signal over the operative bandwidth of the equalized loudspeaker system, and a parametric filtering section that provides for localized parametric equalization for compensating for room or other environmental resonances. The filtering system of the invention can be used to create a wide variety of useful filter shapes, while minimizing phase distortion that can harm the transient response of phase-aligned loudspeakers of a loudspeaker system.

Filtering system for equalizing a loudspeaker system

A loudspeaker is provided that passively achieves a directional polar response at low frequencies with a high degree of attenuation between the front and the back of the loudspeaker. The loudspeakerhas a transducer, an enclosurebehind the transducer, and port openingsin the sidewallsof the enclosure to allow a back-wave produced by the transducer to exit the enclosure and combine with the front wave produced by the transducer. Cancellation behind the loudspeaker at low frequencies is achieved by delaying the back wave with low loss. Low loss delay at low frequencies is achieved by inserting a low-density fibrous fill materialin the acoustic chamberformed behind the transducerby the enclosure. A fibrous material is selected having a low-pass transfer function and low acoustic loss in its low-frequency pass band.

Loudspeaker with passive low frequency directional control

A loudspeaker system has a high frequency channel for driving a horn loaded high frequency transducer, and a low frequency channel for driving a low frequency transducer. A signal processing circuit is provided which has at least one first order and at least one second order cross-over circuit portion in the high channel and at least one first order and at least one second order cross-over circuit portion in the low frequency channel. These cross-over portions produce a cross-over frequency range for the loudspeaker system that is below the cut-off frequency of the horn. The signal processing circuit, including its cross-over circuit portions and in conjunction with the design of the expansion walls of the horn, extends vertical beamwidth control of the acoustic output of the loudspeaker system at the loudspeaker system's lower frequency range.

Loudspeaker system with extended constant vertical beamwidth control

Loudspeaker grille

Growing community of inventors

Pleasanton, CA, United States of America

Pablo Espinosa