In the past it was common to hear the aids whistle from time to time because of imperfect fit in the ear canal. Now it is possible to get a hug without experiencing the embarrassment of your loved ones hearing the whistle. A number of digital instruments exist with capacity to remove unwanted whistling caused by feedback. Sometimes whistling can be contained by turning down the volume of the hearing aid. This would, however, also remove sounds that are desired. By introducing a sophisticatedadaptive feedback suppression even with large hearing lossesunwanted feedback can be avoided with no compromise to the quality of sound.