Koninklijke Philips Corporation N.v.

Roelof Jan Wind

Robert Godlieb

Schelte Heeringa

Michiel Allan Aurelius Schallig

Jacob H Botma

Frans Wiebe Rozeboom

Hielke Simon Van Oostrum

Jacob Hendrik Botma

A tap sensitive alarm clock has a housing (), a vibration sensor () mechanically coupled to the housing for receiving a shock due to a user tapping the housing, and a control circuit () coupled to the vibration sensor for controlling a function of the alarm clock. An audio unit () is coupled to an audio circuit () for generating sound, e.g. a loudspeaker in an alarm clock or a wake up light. To avoid interference of the sound and the vibration sensor, the alarm clock is provided with a filter () coupled to the vibration sensor and the control circuit. The filter has a filter curve matched to block frequencies occurring in the sound. Advantageously it is avoided that the sound frequencies trigger the function, while the sensor is sensitive to other frequencies up to the frequency range of the sound for reliably detecting the tapping.

Tap sensitive alarm clock

Growing community of inventors

Eindhoven, Netherlands

Roelof Jan Wind