Pablo B Espinosa

US Patent:

D631867, Feb 1, 2011

Filed:

Jan 15, 2010

Appl. No.:

29/353926

Inventors:

Jon M. Arneson - Napa CA, US
Paul Bunning - Berkeley CA, US
Pablo Espinosa - Pleasanton CA, US

Assignee:

Meyer Sound Laboratories, Incorporated - Berkeley CA

International Classification:

1401

US Classification:

D14214

US Patent:

8406445, Mar 26, 2013

Filed:

Oct 1, 2010

Appl. No.:

12/896363

Inventors:

Jon M. Arneson - Napa CA, US
Paul Kohut - Napa CA, US
John D. Meyer - Berkeley CA, US
Pablo Espinosa - Pleasanton CA, US
Richard D. Herr - Berkeley CA, US

Assignee:

Meyer Sound Laboratories, Incorporated - Berkeley CA

International Classification:

H04R 1/20
H04R 1/02

US Classification:

381340, 381338

Abstract:

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.

US Patent:

8428284, Apr 23, 2013

Filed:

Mar 19, 2010

Appl. No.:

12/727788

Inventors:

John D. Meyer - Berkeley CA, US
Jean Pierre Mamin - La Tour de Peilz, CH
Pablo Espinosa - Pleasanton CA, US
Peter Kowalczyk - Berkeley CA, US

Assignee:

Meyer Sound Laboratories, Incorporated - Berkeley CA

International Classification:

H04R 1/20

US Classification:

381345, 381384, 181155, 181156

Abstract:

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 loudspeaker has a transducer , an enclosure behind the transducer, and port openings in the sidewalls of 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 material in the acoustic chamber formed behind the transducer by the enclosure. A fibrous material is selected having a low-pass transfer function and low acoustic loss in its low-frequency pass band.

US Patent:

20130208936, Aug 15, 2013

Filed:

Aug 16, 2012

Appl. No.:

13/587843

Inventors:

John McGhee - Parkdale OR, US
Alejandro Garcia Rubio - Richmond CA, US
Pablo Espinosa - Pleasanton CA, US

International Classification:

H04R 1/02

US Classification:

381332

Abstract:

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.

US Patent:

20170013348, Jan 12, 2017

Filed:

Apr 14, 2016

Appl. No.:

15/099474

Inventors:

- Berkeley CA, US
Katrin Rawks - El Cerrito CA, US
Pablo Espinosa - Pleasanton CA, US

International Classification:

H04R 1/24
H04R 3/14
H04R 1/28

Abstract:

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.