bandpass

This term is primarily used in electrical engineering, telecommunications, and signal processing. It describes a selective mechanism that acts as a window for specific frequencies, effectively blocking both very low and very high signals. It is most frequently encountered as a modifier for the word filter.

When used as a noun, it refers to the actual width or range of the frequency window. In technical documentation, it is often contrasted with low-pass or high-pass filters, which only block one end of the frequency spectrum.