Patent ID: 7804016

Claim:
A method of determining a preference of music of a user by using a music reproduction device, the method comprising: sensing motions of a head of the user while music is reproduced by the music reproduction device, using a three-dimensional motion sensor; comparing a tempo of the sensed motion of the head of the user in an x-axis direction to a tempo of the music, comparing a tempo of the sensed motion of the head of the user in a y-axis motion direction to the tempo of the music, and comparing the sensed motion of the head of the user in a z-axis motion direction to the tempo of the music; determining a preferred tempo of the user from among the tempos of the sensed motions of the head of the user in the x-axis, the y-axis, and the z-axis directions that is most similar to the tempo of the music based on results of the comparing; and determining a range of the preferred tempo of the user based on a result of the determining the preferred tempo of the user.