Nokia Technologies Oy

Antti Vehkaoja

Akos Vetek

Niku Oksala

Jukka Lekkala

Sami Melkoniemi

Jarmo Verho

Veikko Surakka

Ville Rantanen

Toni Vanhala

Oleg Spakov

An arrangement () and a device () for determining pulse transit time comprise an accelerometer () and a pulse wave sensor () for sensing a pulse wave. The accelerometer () determines a cardiac systole, and the pulse wave sensor () determines the pulse wave induced by said cardiac systole ejection. A first trigger signal is determined at the moment of said determined cardiac systole, and a second trigger signal at the moment of said determined pulse wave. The pulse transit time is then determined as a time difference between said first and second trigger signals.

Method, device and arrangement for determining pulse transit time

In accordance with an example embodiment, there is an apparatus that has a headset, a contactless proximity sensor arranged to be supported by the headset in the proximity of a face of a user, and a sensor circuitry configured to cause output of a signal indicative of temporal variations in the distance between the contactless proximity sensor and the face of the user.

Method and apparatus for detecting facial changes

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Tampere, Finland

Antti Vehkaoja