Abstract: A wearable detector for the detection of parameters related to a physical activity includes a support wearable on the user's head, a sound signal reproducing system connected to the support, an accelerometer, a gyroscope, a wireless signal receiving-transmitting device, and a control unit operatively connected to the sound signal reproducing system, to the accelerometer, to the gyroscope and to the receiving-transmitting device at least in order to manage data streams between those devices, wherein the support has a sealed chamber where at least the accelerometer and/or the gyroscope are housed, the support having such an arrangement that, in the worn condition, the chamber is placed substantially at the back of the user's head.