transmitted data via an antenna 315 and after sonifying the signal as discussed below outputs a biofeedback audio signal to speaker 355 or monitor 250 in a known manner monitor 250 may comprise an earpiece 252 and a belt pocket mounted receiver 256 in an alternate embodiment an integrated receiver and headset may be worn by the user by way of general background reference is now made to fig3 at 205 wherein swing analysis parameters are depicted and golf club 200 with accelerometers 220 and 225 having their measurement axis aligned with the axis of the golf club is shown a player not shown having arms indicated at 105 and wrists indicated at 110 is swinging club 200 with head 230 in a circular motion 135 around wrists 110 with an angular velocity of u03c9 radians per second in an attempt to hit ball 140 the centripetal acceleration at a particular point on the swinging club can be measured with an accelerometer at the point of interest and whose sensing axis is aligned along the axis of the member in general this centripetal acceleration a c can be used to yield an instantaneous measurement of the angular speed of the club through the relation a c u03c9 2 r where u03c9 is the angular velocity of the club head assuming the accelerometer at or near the head and r is the effective radius through which the accelerometer is moving to estimate the maximum magnitude of this acceleration it has been noted that a player can achieve club heads speeds.