A condenser-type acoustic sensor is provided. In one embodiment, a method for content replacement that may be used in a peer to peer video on demand system is described. A patterned photoresist layer that may be a non-aromatic positive patterned photoresist layer is formed over the dielectric layer. The time indicator and at least one of the position information and the location are used to establish a time at the first basestation such that the first basestation is synchronized to other basestations in the cellular communication system.