Audio device, signal processing method, and display method

An audio device comprising:

• a diaphragm;
• a movable unit that includes a driving coil for driving the diaphragm and a sensing coil for detecting movement of the diaphragm and connects with the diaphragm;
• a magnetic circuit unit that includes a magnet and a yoke and generates magnetic force acting on the driving coil and magnetic force acting on the sensing coil;
• and
• an electric circuit unit that generates a driving signal of the driving coil according to a sensing signal generated by the sensing coil,
• wherein the electric circuit unit includes a feedback control unit that has a feedback loop for processing an audio signal according to the sensing signal and a feedforward control unit that performs arithmetic processing using a predetermined coefficient for the audio signal input to the feedback loop.

A signal processing method for an audio device,

• the audio device including
• a diaphragm,
• a movable unit that includes a driving coil for driving the diaphragm and a sensing coil for detecting movement of the diaphragm and connects with the diaphragm,
• a magnetic circuit unit that includes a magnet and a yoke and generates magnetic force acting on the driving coil and magnetic force acting on the sensing coil, and
• an electric circuit unit that generates a driving signal of the driving coil according to a sensing signal generated by the sensing coil,
• the signal processing method comprising:
• by the electric circuit unit,
• performing feedback control that processes an audio signal by using a feedback loop to which the sensing signal is input and feedforward control that performs arithmetic processing using a predetermined coefficient for the audio signal input to the feedback loop.

A display method for an audio device,

• the audio device including
• a diaphragm,
• a movable unit that includes a coil and connects with the diaphragm, and
• a magnetic circuit unit that includes a magnet and a yoke and generates magnetic force acting on the coil,
• the magnetic circuit unit including a top plate portion that constitutes a part of the yoke and has a top surface portion located above the magnet and extending in a direction substantially perpendicular to a movable direction of the movable unit,
• the top plate portion having a protrusion portion that protrudes downward from an inner edge or an outer edge of the top surface portion,
• the movable unit including a driving coil for driving the diaphragm and a sensing coil for detecting movement of the diaphragm each constituting the coil, and
• winding portions of the driving coil and the sensing coil of the movable unit facing a protruding side surface that is a side surface of the top plate portion on a side where the protrusion portion is formed,
• the display method comprising:
• displaying information that indicates a vibration transfer characteristic associated with the audio device and measured according to a detection signal generated by the sensing coil.