Motorola Corporation

Motorola Mobility LLC

Scott K Isabelle

Robert A Zurek

Joel A Clark

David B Cranfill

Alfred B Wieczorek

Holly Francois

James Alexander Rex

David John Pearce

Rindala Saliba

Jeffrey M Axelrod

Scott D Kelley

Sandra J Guzman

Holly L Francois

David J Pearce

James A Rex

A system, method, and apparatus for separating speech signal from a noisy acoustic environment. The separation process may include directional filtering, blind source separation, and dual input spectral subtraction noise suppressor. The input channels may include two omnidirectional microphones whose output is processed using phase delay filtering to form speech and noise beamforms. Further, the beamforms may be frequency corrected. The omnidirectional microphones generate one channel that is substantially only noise, and another channel that is a combination of noise and speech. A blind source separation algorithm augments the directional separation through statistical techniques. The noise signal and speech signal are then used to set process characteristics at a dual input noise spectral subtraction suppressor (DINS) to efficiently reduce or eliminate the noise component. In this way, the noise is effectively removed from the combination signal to generate a good qualify speech signal.

Robust two microphone noise suppression system

A mobile station () that includes a processor () that selectively disables at least one station component to reduce electromagnetic noise generated by the station in the frequency range below 20 kHz when the mobile station is operated in the hearing aid compatible mode. The component can be, for example, a display (), a light () or a wireless interface (). The processor also can optimize characteristics of audio signals transmitted from the mobile station to the hearing aid for reproduction by the hearing aid. For instance, the processor can selectively adjust filter parameters () and/or a signal gain () applied to audio signals. A user interface () having a soft-key can be provided to cycle through various HAC options.

Hearing aid compatibility mode switching for a mobile station

A portable electronic device () includes a vibrating transducer having a resilient support and a first mass supported by the first resilient support forming a mechanical resonator, and an electrical circuit coupled to the first vibrating transducer to apply a drive signal. A plurality of tactile vibration transducers () can work in unison to produce strong tactile stimulus ().

Tactile transducers and method of operating

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Waukegan, IL, United States of America

Scott K Isabelle