A system for sensing human emotions comprising: a wearable headset comprising a microphone arm; the microphone arm being configured to extend over a cheek of a user to the proximity of the mouth of the user; the microphone arm being further configured to hold a microphone near a face of the user; a contactless capacitive sensor attached to the wearable headset and supported by the microphone arm in the proximity of the face of the user and configured to measure capacitance at the corner of the mouth of the user when the headset is worn by the user; the system further comprising an apparatus that comprises: at least one processor; and at least one memory including computer program code; the at least one memory and the computer program code being configured to, with the at least one processor, cause the apparatus to perform at least the following: associating facial detection criteria with facial changes comprising smiling and grimacing; receiving capacitance variation information based on operation of at least the contactless capacitive sensor indicative of facial changes comprising a smile or a grimace; searching for the associated facial changes from the received capacitance variation information using the facial detection criteria; determining the facial change that is associated with the matched facial detection criteria in question on finding a sufficient correspondence between the facial detection criteria and the received capacitance variation information; and sensing an emotion of the user based on the determined facial change. a wearable headset comprising a microphone arm; the microphone arm being configured to extend over a cheek of a user to the proximity of the mouth of the user; the microphone arm being further configured to hold a microphone near a face of the user; a contactless capacitive sensor attached to the wearable headset and supported by the microphone arm in the proximity of the face of the user and configured to measure capacitance at the corner of the mouth of the user when the headset is worn by the user; the system further comprising an apparatus that comprises: at least one processor; and at least one memory including computer program code; the at least one memory and the computer program code being configured to, with the at least one processor, cause the apparatus to perform at least the following: associating facial detection criteria with facial changes comprising smiling and grimacing; receiving capacitance variation information based on operation of at least the contactless capacitive sensor indicative of facial changes comprising a smile or a grimace; searching for the associated facial changes from the received capacitance variation information using the facial detection criteria; determining the facial change that is associated with the matched facial detection criteria in question on finding a sufficient correspondence between the facial detection criteria and the received capacitance variation information; and sensing an emotion of the user based on the determined facial change. associating facial detection criteria with facial changes comprising smiling and grimacing; receiving capacitance variation information based on operation of at least the contactless capacitive sensor indicative of facial changes comprising a smile or a grimace; searching for the associated facial changes from the received capacitance variation information using the facial detection criteria; determining the facial change that is associated with the matched facial detection criteria in question on finding a sufficient correspondence between the facial detection criteria and the received capacitance variation information; and sensing an emotion of the user based on the determined facial change.