Signal-processing method, comprising steps consisting in: - storing beforehand in a memory a first initial signal generated by a first set of at least one three-axis accelerometer positioned on the thorax of an individual, - storing beforehand in a memory a second initial signal generated by a second set of at least one three-axis accelerometer positioned on the abdomen of the individual, the second signal being synchronized with the first signal, - processing the data of the first initial signal to compute a first final vector, which is a reconstruction of the respiratory effort of the thoracic compartment, and which is representative of the thoracic efforts undergone by the first set of at least one three-axis accelerometer, - processing the data of the second initial signal to compute a second final vector, which is a reconstruction of the respiratory effort of the abdominal compartment, and which is representative of the abdominal efforts undergone by the second set of at least one three-axis accelerometer, characterized in that it further comprises: - reconstructing the respiratory efforts based on the first final vector and on the second final vector via: ∘ an angular computation, comprising measuring the angular movement of the rotation axis (r) of each accelerometer, and computing ▪ the first final vector, which contains the values ( Φ t) of the rotation angle of the first set of at least one accelerometer in a time window, ▪ the second final vector, which contains the values ( Φ t) of the rotation angle of the second set of at least one accelerometer in a time window. - storing beforehand in a memory a first initial signal generated by a first set of at least one three-axis accelerometer positioned on the thorax of an individual, - storing beforehand in a memory a second initial signal generated by a second set of at least one three-axis accelerometer positioned on the abdomen of the individual, the second signal being synchronized with the first signal, - processing the data of the first initial signal to compute a first final vector, which is a reconstruction of the respiratory effort of the thoracic compartment, and which is representative of the thoracic efforts undergone by the first set of at least one three-axis accelerometer, - processing the data of the second initial signal to compute a second final vector, which is a reconstruction of the respiratory effort of the abdominal compartment, and which is representative of the abdominal efforts undergone by the second set of at least one three-axis accelerometer, - reconstructing the respiratory efforts based on the first final vector and on the second final vector via: ∘ an angular computation, comprising measuring the angular movement of the rotation axis (r) of each accelerometer, and computing ▪ the first final vector, which contains the values ( Φ t) of the rotation angle of the first set of at least one accelerometer in a time window, ▪ the second final vector, which contains the values ( Φ t) of the rotation angle of the second set of at least one accelerometer in a time window. ∘ an angular computation, comprising measuring the angular movement of the rotation axis (r) of each accelerometer, and computing ▪ the first final vector, which contains the values ( Φ t) of the rotation angle of the first set of at least one accelerometer in a time window, ▪ the second final vector, which contains the values ( Φ t) of the rotation angle of the second set of at least one accelerometer in a time window. ▪ the first final vector, which contains the values ( Φ t) of the rotation angle of the first set of at least one accelerometer in a time window, ▪ the second final vector, which contains the values ( Φ t) of the rotation angle of the second set of at least one accelerometer in a time window.