cancellation effect

cancellation effect

A condition in which positive and negative charges or same frequencies of positive and negative polarities nullify each other. The cancellation effect may result from unintentional interference in a line or circuit, or it may be purposely created. For example, noise cancellation systems generate frequencies with opposite polarities to the undesirable signals in order to eliminate them.
References in periodicals archive ?
The Panasonic RP-HC800 Noise Cancelling Headphones utilize a high performance Active Noise Cancelling System with improved Feed-back Noise Cancelling Technology for a wide-range noise cancellation effect.
Many people will mention "floor bounce" when discussing cancellation effects and speaker measurements, but the phenomenon happens with all large room boundaries and not just the floor.
With just a press of a switch the user can disable the noise cancellation effects of the headphones and allow ambient sounds to pass through, thereby hearing the flight attendant or co-worker trying to get your attention without removing the headphones.