  We propose and experimentally demonstrate a general method allowing us to
unravel microscopic noise events that affect a continuous quantum variable.
Such unraveling is achieved by frequent measurements of a discrete variable
coupled to the continuous one. The experimental realization involves photons
traversing a noisy channel. There, their polarization, whose coupling to the
photons spatial wavepacket is subjected to stochastic noise, is frequently
measured in the quantum Zeno regime. The measurements not only preserve the
polarization state, but also enable the recording of the full noise statistics
from the spatially-resolved detection of the photons emerging from the channel.
This method proves the possibility of employing photons as quantum noise
sensors and robust carriers of information.
