Franklin S Felber

US Patent:

7908134, Mar 15, 2011

Filed:

Nov 1, 2006

Appl. No.:

11/555654

Inventors:

Franklin S. Felber - San Diego CA, US

Assignee:

Starmark, Inc. - San Diego CA

International Classification:

G10L 19/14

US Classification:

704205, 704225

Abstract:

A microphone detects acoustic waves from speakers, or for a two-way voice communication device, a user's voice and background noise, and produces a corresponding signal; a subtractor finds the difference between the microphone signal and a desired audio signal; a transform process produces over a time period a signal corresponding to the amplitude of each frequency component of the difference signal; from the transform process a bandpass filter passes only frequency components within selected bands; a speech interference noise level calculator calculates a combination of the amplitudes of the bandpass filtered frequency components; and a solver uses the combination to produce, according to an algorithm, a signal for controlling the gain of an audio amplifier. Phase and amplitude correlation can be done prior to subtraction.

US Patent:

20120008802, Jan 12, 2012

Filed:

Jan 3, 2011

Appl. No.:

12/983822

Inventors:

Franklin S. Felber - San Diego CA, US

International Classification:

H03G 3/00
G10L 15/20

US Classification:

381107, 704233, 704E15004

Abstract:

A voice detection system and method for automatic volume controls and voice sensors is disclosed. More specifically, the invention addresses a situation where the user's own voice undesirably affects the functionality of an automatic volume control for a two-way communication device, such as a cellular telephone. In addition, the invention proposes solutions wherein one (voice) microphone is employed and also, when two (voice and noise) microphones are employed. Further, an algorithm is disclosed that addresses the issue concerning the user's own voice in an AVC pertaining to the two microphone solution. Yet further, a method herein is disclosed that detects the presence of voice in a single non-selective (noise) microphone.

US Patent:

7760893, Jul 20, 2010

Filed:

Jul 26, 2006

Appl. No.:

11/460246

Inventors:

Franklin S. Felber - San Diego CA, US

Assignee:

Starmark, Inc. - San Diego CA

International Classification:

H03G 3/00
H03G 3/20

US Classification:

381104, 381107, 381 57

Abstract:

A microphone detects acoustic waves from speakers and background noise, and produces a corresponding signal that is digitized; also digitized is a desired audio signal; the two digitized signals are phase and amplitude correlated; a subtractor finds the difference between the correlated microphone and audio signals; a transform process produces over a time period a signal corresponding to the amplitude of each frequency component of the difference signal; from the transform process a bandpass filter passes only frequency components within selected bands; a speech interference noise level calculator calculates a combination of the amplitudes of the bandpass filtered frequency components; and a solver uses the combination to produce, according to an algorithm, a signal for controlling the gain of an audio amplifier.

US Patent:

20180188363, Jul 5, 2018

Filed:

Feb 28, 2018

Appl. No.:

15/908019

Inventors:

- San Diego CA, US
Franklin S. Felber - San Diego CA, US

International Classification:

G01S 7/521
G01S 15/87
G01S 15/04
G01V 1/02

Abstract:

Mechanical transducers efficiently produce and couple high-power acoustic pulses into liquid and solid media. In a transmitter, mechanical excitation of a thin transmitting plate is provided by an actuator or a motor that causes a mass to strike or a drive rod to push the thin plate. If struck, as the thin plate rings down, it delivers much of its kinetic energy to acoustic radiation in the dense medium. Different mechanisms may be used to excite the plate, and different mechanisms may be used to couple the plate excitations into dense media. Conditions are found for efficient transduction of mechanical energy by a thin plate into acoustic radiation in solid and liquid media. A receiver comprises a plate having matching resonances to the transmitting plate. Discrete narrowband frequencies of acoustic signals are used to detect phase changes in waves reflected from a moving object. By interfering successive return pulses, small changes in phase and amplitude within the reflected beam lead to large changes in interfering voltage waveforms.

US Patent:

20150293213, Oct 15, 2015

Filed:

Apr 10, 2014

Appl. No.:

14/250223

Inventors:

FRANKLIN S. FELBER - SAN DIEGO CA, US

International Classification:

G01S 7/521
G01S 15/04
F03B 13/18
G01S 15/02

Abstract:

Mechanical transducers efficiently produce and couple high-power acoustic pulses into liquid and solid media. In a transmitter, mechanical excitation of a thin transmitting plate is provided by an actuator or a motor that causes a mass to strike or a drive rod to push the thin plate. If struck, as the thin plate rings down, it delivers much of its kinetic energy to acoustic radiation in the dense medium. Different mechanisms may be used to excite the plate, and different mechanisms may be used to couple the plate excitations into dense media. Conditions are found for efficient transduction of mechanical energy by a thin plate into acoustic radiation in solid and liquid media. A receiver comprises a plate having matching resonances to the transmitting plate. Discrete narrowband frequencies of acoustic signals are used to detect phase changes in waves reflected from a moving object. By interfering successive return pulses, small changes in phase and amplitude within the reflected beam lead to large changes in interfering voltage waveforms.