Low frequency anomaly or distortion created when a certain frequency is reproduced whose size has some special relation to the room or object it is produced in (wavelength the same size as the room dimensions) resulting in the room or object resonating with the sound and increasing the strength of the sound (the sound wave does not diminish and may instead increase as it interacts with its surroundings). The end result of a standing wave is a very loud signal greater than that presented by the original signal. The sound wave is essentially amplified by the space in which it exists. tanding waves create loud, booming bass at some frequencies that adversely affect the sound field and acoustic presentation. The bass drowns out the other signal elements in the midrange and treble frequencies and does not follow along with the signal. Standing waves can be reduced or eliminated through careful placement of speakers, particularly subwoofers, and potentially some room tuning.