Spectral subtraction algorithm software for use in noise cancellation and/or reduction in the field of computers [, digital signal processors, and microprocessor platforms ] ; audio equipment, namely, microphones [, far-field adaptive arrays, computers, digital signal processors, and microprocessor platforms, and telephone transmitters ]

A software application for enhancing digital voice and audio recording and for enhancing background noise reduction and sound quality; an intelligibility enhancing software application for use with mobile audio and video and smartphone and touch devices

Hifi audio speakers; audio speakers

Hifi Audio; audio speakers

Design of home and commercial automation systems, information technology (IT) networks, and audio-video systems; Installation of software for home and commercial automation systems, information technology (IT) networks and audio-video systems