A method of suppressing near-end audio acoustically coupled at a far-end conference unit and returned to a near-end conference unit in a conference, the method being performed by a device and comprising the steps of: determining near-end energy output of near-end audio sent from the near-end conferencing unit to the far-end conferencing unit by filtering the near-end audio into bands and determining a near-end energy output of each of the bands; determining far-end energy output of far-end audio sent from the far-end conferencing unit to the near-end conferencing unit by filtering the far-end audio into said bands and determining a far-end energy output of each of the bands; detecting whether a return of the sent near-end audio is present in the sent far-end audio by: cross-correlating the near-end and far-end energy outputs for each of the bands to one another at increments of time delay over a time delay range, determining the time delay having a greatest cross-correlation for all of the bands, and when said cross-correlation is high enough at said time delay: estimating for each of the bands a ratio of the far-end energy output to the near-end energy output, determining a result by multiplying the near-end energy output by the ratio, determining that the result is equal to the far-end energy output, and if this is the case: offsetting the near-end energy output versus time using the determined time delay to match the far-end energy output, comparing the far-end energy output to the offset near-end energy output times the ratio for each of the bands, determining a count of the bands for which the offset near-end energy output multiplied times the ratio that is less than or equal to an expected value, and declaring a presence of the return when the determined count is greater than a threshold; and if the return is detected, suppressing the detected return from being output at the near-end conferencing unit; wherein the return is caused by the sent near-end audio being acoustically coupled at the far-end conferencing unit and returned as part of the received far-end audio. determining near-end energy output of near-end audio sent from the near-end conferencing unit to the far-end conferencing unit by filtering the near-end audio into bands and determining a near-end energy output of each of the bands; determining far-end energy output of far-end audio sent from the far-end conferencing unit to the near-end conferencing unit by filtering the far-end audio into said bands and determining a far-end energy output of each of the bands; detecting whether a return of the sent near-end audio is present in the sent far-end audio by: cross-correlating the near-end and far-end energy outputs for each of the bands to one another at increments of time delay over a time delay range, determining the time delay having a greatest cross-correlation for all of the bands, and when said cross-correlation is high enough at said time delay: estimating for each of the bands a ratio of the far-end energy output to the near-end energy output, determining a result by multiplying the near-end energy output by the ratio, determining that the result is equal to the far-end energy output, and if this is the case: offsetting the near-end energy output versus time using the determined time delay to match the far-end energy output, comparing the far-end energy output to the offset near-end energy output times the ratio for each of the bands, determining a count of the bands for which the offset near-end energy output multiplied times the ratio that is less than or equal to an expected value, and declaring a presence of the return when the determined count is greater than a threshold; and cross-correlating the near-end and far-end energy outputs for each of the bands to one another at increments of time delay over a time delay range, determining the time delay having a greatest cross-correlation for all of the bands, and when said cross-correlation is high enough at said time delay: estimating for each of the bands a ratio of the far-end energy output to the near-end energy output, determining a result by multiplying the near-end energy output by the ratio, determining that the result is equal to the far-end energy output, and if this is the case: offsetting the near-end energy output versus time using the determined time delay to match the far-end energy output, comparing the far-end energy output to the offset near-end energy output times the ratio for each of the bands, determining a count of the bands for which the offset near-end energy output multiplied times the ratio that is less than or equal to an expected value, and declaring a presence of the return when the determined count is greater than a threshold; and offsetting the near-end energy output versus time using the determined time delay to match the far-end energy output, comparing the far-end energy output to the offset near-end energy output times the ratio for each of the bands, determining a count of the bands for which the offset near-end energy output multiplied times the ratio that is less than or equal to an expected value, and declaring a presence of the return when the determined count is greater than a threshold; and if the return is detected, suppressing the detected return from being output at the near-end conferencing unit; wherein the return is caused by the sent near-end audio being acoustically coupled at the far-end conferencing unit and returned as part of the received far-end audio.