Acoustic Transducers in Haptic Systems

A method comprising:

• driving a first transducer by a synchronized input signal;
• placing a first microphone at a first predetermined spatial offset from the first transducer to obtain a reference output signal having a reference polarity;
• assigning a first variable corresponding to the reference polarity to a first polarity value;
• entering the first polarity value into an array;
• driving a second transducer by the synchronized input signal;
• placing a second microphone at a second predetermined spatial offset from the second transducer to obtain a second output signal having a second polarity, wherein the second predetermined spatial offset is substantially equivalent to the first predetermined spatial offset;
• if the second polarity is equal to the reference polarity, assigning the first variable to a second polarity value;
• if the second polarity is opposite to the reference polarity, assigning a second variable corresponding to the opposite of the reference polarity to the second polarity value;
• if the second output signal is a null signal, assigning a null variable to the second polarity value;
• and
• entering the second polarity value to the array.

A method of calibrating an array of a plurality of acoustic transducers, comprising:

• a) for each of the plurality of acoustic transducers:
• i) pulsing the acoustic transducer with an acoustic transducer input to create an acoustic transducer output;
• ii) receiving the acoustic transducer output by a reference transducer;
• iii) comparing the acoustic transducer output with a reference transducer output to create acoustic calibration data;
• b) creating a complex valued phasor map using the acoustic calibration data from each of the plurality of acoustic transducers.