Systems and methods for generating damped electromagnetically actuated planar motion for audio-frequency vibrations

摘要

A vibration module for applying vibrational tractions to a wearer's skin is presented. Use of the vibration module in headphones is illustrated for providing tactile sensations of low frequency for music, for massage, and for electrical recording and stimulation of the wearer. Damped, planar, electromagnetically-actuated vibration modules of the moving magnet type are presented in theory and reduced to practice, and shown to provide a substantially uniform frequency response over the range 40-200 Hz with a minimum of unwanted audio.

主权项

1. A vibration module for generating damped electromagnetically actuated planar motion, the module comprising:
at least one conductive coil; at least one magnet arranged in operative proximity to the coil; a moveable member coupled to one of the at least one conductive coil and the at least one magnet; a suspension that guides the moveable member with respect to the other one of the at least one conductive coil and the at least one magnet; and a damping member in structural communication with the moveable member, wherein the damping member flattens the acceleration response of the module to a Q-factor of less than 1.5, over the frequency range of 40-200 Hz in response to steady-state sinusoidal signals applied to the at least one coil.