Patent ID: 9075398
Filing Date: 2015-07-07
Classification: G04G

Abstract:
1. A wake up alarm providing device comprising a sound producing unit for providing an audible wake up signal during an alert period and a control unit, coupled to the sound producing unit for controlling the wake up signal, the control unit being arranged to: control the wake up signal to comprise a localized sound and a diffuse sound, the localized sound providing, at a predetermined target position, a localized spatial sound spectrum having a maximum sound intensity from a single predetermined direction, the diffuse sound providing, at the predetermined target position, a diffuse spatial sound spectrum having peak sound intensities from multiple directions, control the wake up signal such that a sum of the peak sound intensities of the diffuse sound exceeds the maximum sound intensity of the localized sound during a first part of the alert period, and control the wake up signal such that a ratio of the sum of the peak sound intensities of the diffuse sound to the maximum sound intensity of the localized sound is decreased during a subsequent part of the alert period.