A noise-cancellation system, comprising: a noise-cancellation filter configured to generate a noise-cancellation signal based on a noise signal received from a noise sensor; an actuator disposed at a first location within a predefined volume and configured to receive the noise-cancellation signal and to transduce a noise-cancellation audio signal within the predefined volume; a reference sensor disposed at a second location within the predefined volume and to output a reference sensor signal, the reference sensor signal being representative of an undesired noise at the second location; a filter configured to filter the noise-cancellation signal and the reference sensor signal to output a filter output signal, the filter output signal representing an estimate of the undesired noise at a third location remote from the first location and the second location; and an adjustment module configured to adjust the noise-cancellation filter, based on the filter output signal, such that the noise-cancellation audio signal destructively interferes with the undesired noise at the third location, wherein the filter comprises a first filter configured to estimate a relationship between the second location and the third location, the first filter being configured to receive and filter the reference sensor signal and to output a first filter output signal, the first filter output signal being an estimate of the undesired noise at the third location, and wherein the filter further comprises a second filter configured to estimate a relationship between the first location and the third location, the second filter being configured to receive and filter the noise-cancellation signal and to output a second filter output signal, the second filter output signal being an estimate of the noise-cancellation audio signal at the third location, characterized int that the second filter output signal is configured to cancel a portion of the first filter output signal based on the noise cancellation audio signal received at the reference sensor, when the first filter output signal and the second filter output signal are summed, and in that the second filter is further configured to correct for the noise-cancellation audio signal received by the reference sensor. a noise-cancellation filter configured to generate a noise-cancellation signal based on a noise signal received from a noise sensor; an actuator disposed at a first location within a predefined volume and configured to receive the noise-cancellation signal and to transduce a noise-cancellation audio signal within the predefined volume; a reference sensor disposed at a second location within the predefined volume and to output a reference sensor signal, the reference sensor signal being representative of an undesired noise at the second location; a filter configured to filter the noise-cancellation signal and the reference sensor signal to output a filter output signal, the filter output signal representing an estimate of the undesired noise at a third location remote from the first location and the second location; and an adjustment module configured to adjust the noise-cancellation filter, based on the filter output signal, such that the noise-cancellation audio signal destructively interferes with the undesired noise at the third location, wherein the filter comprises a first filter configured to estimate a relationship between the second location and the third location, the first filter being configured to receive and filter the reference sensor signal and to output a first filter output signal, the first filter output signal being an estimate of the undesired noise at the third location, and wherein the filter further comprises a second filter configured to estimate a relationship between the first location and the third location, the second filter being configured to receive and filter the noise-cancellation signal and to output a second filter output signal, the second filter output signal being an estimate of the noise-cancellation audio signal at the third location, characterized int that the second filter output signal is configured to cancel a portion of the first filter output signal based on the noise cancellation audio signal received at the reference sensor, when the first filter output signal and the second filter output signal are summed, and in that the second filter is further configured to correct for the noise-cancellation audio signal received by the reference sensor.