  We present observational constraints on the solar chromospheric heating
contribution from acoustic waves with frequencies between 5 and 50 mHz. We
utilize observations from the Dunn Solar Telescope in New Mexico complemented
with observations from the Atacama Large Millimeter Array collected on 2017
April 23. The properties of the power spectra of the various quantities are
derived from the spectral lines of Ca II 854.2 nm, H I 656.3 nm, and the
millimeter continuum at 1.25 mm and 3 mm. At the observed frequencies the
diagnostics almost all show a power law behavior, whose particulars (slope,
peak and white noise floors) are correlated with the type of solar feature
(internetwork, network, plage). In order to disentangle the vertical versus
transverse plasma motions we examine two different fields of view; one near
disk center and the other close to the limb. To infer the acoustic flux in the
middle chromosphere, we compare our observations with synthetic observables
from the time-dependent radiative hydrodynamic RADYN code. Our findings show
that acoustic waves carry up to about 1 kW m$^{-2}$ of energy flux in the
middle chromosphere, which is not enough to maintain the quiet chromosphere,
contrary to previous publications.
