  An effect we have termed the acousto-thermoelectric effect is theorized for
temperature gradients driven by acoustic modulation. The effect produces a
dynamic and spatially varying voltage. Adiabatic acoustic fluctuations in a
solid cause temperature variations and temperature gradients that generate
quasi-static thermoelectric effects correlated with the time and spatial scales
of the acoustic fluctuations. This phenomenon is distinctive from the static
thermoelectric effect in that the hot spots (heat sources) and cold spots (heat
sinks) change locations and vary over short time scales. Predictions are made
for a semiconductor material, indium antimonide, showing that the effect is
measurable under laboratory conditions. The sample is excited by a resonant
acoustic mode with frequency 230 kHz, wavelength of 1.37 cm, and pressure
amplitude of 2.23 MPa (rms). The predicted peak voltage between positions where
maximum and minimum temperatures occur is 2.6 {\mu}V. The voltage fluctuates
with the same frequency as acoustic resonance.
