Device and method for measuring air movement
First Claim
1. A device for generating sounds based on air movement, said device comprising:
- (a) an enclosure providing an external surface for airflow;
(b) at least one differential pressure transducer having ports pneumatically coupled with the air outside of said enclosure;
(c) processing means coupled to each differential pressure transducer and operable to measure the pressure difference between said ports; and
(d) sound generating means operable to create sounds with parameters based on changes to said pressure difference.
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Abstract
This device has a detection means to measure the relative amount of air movement in its vicinity. The detection means is coupled to a processing means for creating a variable trigger signal that is proportional to detected air movement. The detection means consists of a differential pressure transducer mounted inside a specially-shaped enclosure. The pressure transducer is arranged to measure the air pressure difference between two holes in the enclosure. The shape of the enclosure causes air to flow at different velocities near the holes, creating a differential air pressure. The processing means consists of a microprocessor that periodically samples the signal from the differential pressure transducer. A programmed algorithm calculates a variable trigger signal value based on a plurality of sampled signals. The processing means can also incorporate an algorithm for digitally generating audio signals that have attributes based on the value of the trigger signal.
15 Citations
23 Claims
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1. A device for generating sounds based on air movement, said device comprising:
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(a) an enclosure providing an external surface for airflow; (b) at least one differential pressure transducer having ports pneumatically coupled with the air outside of said enclosure; (c) processing means coupled to each differential pressure transducer and operable to measure the pressure difference between said ports; and (d) sound generating means operable to create sounds with parameters based on changes to said pressure difference. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of generating sounds based on air movement around a device, said method comprising:
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(a) providing a plurality of airflow paths across the surface of said device; (b) detecting differences in the air pressure of said airflow paths; (c) generating a pressure differential signal based upon differences in the air pressure of said airflow paths; (d) generating a variable trigger signal representing the relative magnitude of said air pressure differential signal; (e) processing said variable trigger signal; and (f) generating a plurality of sounds having parameters dependent on said processing of variable trigger signal. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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Specification