PC interface for a stepped filter octave band analyzer
Miguel A. Horta, Marco Antonio Cristóbal Vázquez · The Journal of the Acoustical Society of America · 2002
Spectrum analyzers are a basic tool for an acoustic engineer. Since almost anyone in a classroom has access to a PC or notebook computer, a low cost alternative for measuring many different parameters with a spectrum analyzer (such as reverberation time, transmission loss, or equivalent noise level) is a digital interface that processes the signal combined with the proper software for the computer. This is a design of a spectrum analyzer that does such a task. The external interface sequentially processes the signal in an octave band filter bank and converts it to data for the computer to display. Depending on the software, the data can be used to measure any of the signal’s desired parameters.