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Thursday, October 28 • 9:00pm - Friday, December 3 • 6:00pm
The effect of user's hands on mobile device frequency response, Part 1

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First results of a study of the effects of the user’s hands on the frequency response and channel balance of a mobile phone hands-free loudspeaker are presented. The results show that the response variation caused by the user’s hands is high (up to 10 dB boost in narrow ranges) and highly user dependent, although general trends can be observed. The variation between users is strong especially above 5 kHz. The acoustical causes for the observed response shape are studied using a FEM model, indicating that especially the shape of the palm explains the observed features of the frequency responses. A conclusion of the results is that developing more realistic measurement methods is needed if more natural tonal balance is attempted in handheld devices.


Juha Backman

AAC Technologies Solutions Finland OY

Lauri Veko

AAC Technologies Solutions Finland Oy

Yuheng Jiang

AAC Technologies Holdings Inc

Thursday October 28, 2021 9:00pm - Friday December 3, 2021 6:00pm EST