Patent ID: 6899633

Claim:
An apparatus for producing an acoustic profile representative of the acceleration pattern of an object moving in at least a first direction through a path of travel, the apparatus comprising: a flute assembly attachable to the object, the flute assembly comprising at least two flutes having different fundamental frequencies, wherein the two flutes are oriented in the flute assembly so that, when the flute assembly is attached to the object and the object is accelerated in the first direction through the path of travel at speeds sufficient to generate resonance in each of the two flutes, the flute assembly produces an acoustic profile including two sequential tones; wherein the object comprises an elongate shaft having a longitudinal axis, wherein the at least two flutes comprises first and second flutes, wherein each of the flutes has a longitudinal axis, and wherein the first and second flutes are longitudinally positionable along the shaft of the object so that the longitudinal axis of each flute is parallel to the longitudinal axis of the shaft; and a connector assembly adapted to attach the flute assembly to the object.