Frequency band displacement for optimizing acoustic boxes above the natural frequency of the loudspeaker

Abstract

This project deals with the implementation of an algorithm for frequency band displacement for the optimization of acoustic boxes. This is particularly relevant in the Car-audio industry and similar applications, when limitations of volume and space are present. The work gives an alternative solution to the problem of huge acoustic boxes sizes for the reproduction of low frequencies, using DSP, optimizing small boxes with midrange loudspeaker, without losing the information in the low frequency region. In this paper, information about loudspeaker design and performance is held, as well as the development of an algorithm that analyzes the input signal through the FFT, in order to adapt the fundamental frequency of the input signal to a basic home system or car audio. Analyzing the results of the transfer function it can be observed how the input signal adapts, reaching the optimization of the frequency response of the sound box above the natural frequency of the loudspeaker.