Measurements Taken with a Hand Moving Near the Ear

Several Measurements of the AEPTF were taken with a hand moving near the subject's ear. The hand moved parallel to the ear from a position 12 inches from the ear to a position 1.5 inches from the ear. The hand moved through one cycle in about 3 seconds.

The 3-D plot and spectrogram are typical of the 'moving hand' situation. When the hand is far, the AEPTF resembles the baseline measurements. As the hand moves close to the ear, a resonance moves from 2 to 4kHz. This resonance moves at a rate of 2kHz/second. As the hand makes its closest approach to the ear, a new resonance begins to appear at 1.5kHz.
The greatest rate of change occurs near 4kHz as the hand moves close to the ear. Here, the AEPTF changes at a rate of 7dB over a 250msec interval.

3-D Plot of the AEPTF with a Hand Moving Near the Ear

[3-D AEPTF w/moving hand]

Spectrogram of the AEPTF with a Hand Moving Near the Ear

[AEPTF w/moving hand]

View a plot of the AEPTF as it changes in time (170kbytes)

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