An improved system and method are disclosed for improving functionality in software applications. The signal analysis instrument comprises a computer, a phase shift mechanism, a receiver mechanism and data acquisition device. An identification is made, based on the cumulative autocorrelation, whether the received signal is formatted in accordance with the communication protocol. The mixture gas in the clearance is exhausted and cooled, and the molded product is taken out. For an input to the resonance filter, a time-variable gain K is used that varies depending on the time lapsed after the completion of a seek operation. The brush can also be used as clothes brush or for upholstered furniture or carpets.