IN-EAR EARPHONE

The invention relates to an in-ear headphone (10) comprising, in an anatomical housing (14), an electro-acoustic transducer (18) adapted to propagate sound, a control unit (20) controlling the electro-acoustic transducer (18) adapted to receive a signal to be reproduced, the control unit comprising an equalization filter applied to the signal to be reproduced, the control unit (20) being connected to an internal microphone (30) of the headphone. The control unit (20) further comprises means for estimating the infrasound path, and means for defining and continuously applying an equalization filter as a function of the estimation of the infrasound path. The earphone includes an external microphone (32). The means for estimating the infrasound path is also adapted to estimate the infrasound path from the sound signal measured by the external microphone (32).