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A practice ball responsive to acceleration for use in practicing sports and an acceleration sensor therefor. The practice ball includes an electronics housing; an acceleration sensor mounted in the electronics housing and responsive to acceleration of the practice ball; a sound generating device als

A practice ball responsive to acceleration for use in practicing sports and an acceleration sensor therefor. The practice ball includes an electronics housing; an acceleration sensor mounted in the electronics housing and responsive to acceleration of the practice ball; a sound generating device also mounted in the electronics housing and responsive to the acceleration sensor; and a soft deformable shell having a shape which simulates a sports ball. The soft deformable shell, which is capable of snugly accommodating the electronics housing, may be supported by a tether line connected to the electronics housing. The acceleration sensor preferably includes at least two switching elements, each of which is responsive to a different magnitude of acceleration. The sound generating device is then responsive to the switching elements so as to emit different programmed sounds depending on which of the switching elements is/are actuated by acceleration of the practice ball. The different programmed sounds may include verbal messages from a voice simulation device in the sound generating device. Preferably, the practice ball is a soft, foam soccer ball for use in practicing the art of heading a soccer ball.

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[ We claim:] [1.] A practice ball responsive to acceleration which comprises:a shell having a shape which simulates a sports ball;an electronics housing positioned in said shell;a tether line connected to said electronics housing;an impact sensor mounted to said electronics housing and responsive to

[ We claim:] [1.] A practice ball responsive to acceleration which comprises:a shell having a shape which simulates a sports ball;an electronics housing positioned in said shell;a tether line connected to said electronics housing;an impact sensor mounted to said electronics housing and responsive to impact imparted to the practice ball and to forces imparted through said tether line; anda sound generator mounted to said electronics housing and responsive to said impact sensor for emitting a programmed sound in response to a predetermined amount of acceleration.