Bandpass filters are electronic devices that allow only a specific range of frequencies to pass through while attenuating frequencies outside of that range. They are commonly used in audio systems to limit the frequency range of signals being amplified or processed. Bandpass filters consist of a combination of high-pass and low-pass filters, which work together to create a band of frequencies that can pass through. The cutoff frequencies of the high pass and low pass filters determine the range of frequencies that will be allowed to pass through the bandpass filter. By selecting the appropriate cutoff frequencies, bandpass filters can be tailored to suit specific applications, such as audio equalization or radio frequency signal processing.