Transdução sonora por banda de frequência para sinalização luminosa

Abstract

In order to bring more technology to the nightclubs of the city, through the lighting, and to have an environment different from the others, this work is designed to make the study of sonorous transduction by frequency band for luminous signaling. First, two types of sound signals, a pink noise and musical signals of different musical styles were analyzed first. The pink noise was analyzed because it has a spectral pattern close to the spectral pattern of a song and the results obtained in the simulations corroborated the theory. It has been noted, in the analysis of different songs, that musical styles such as Electronic and Pop have most of their signals at fower frequencies, bass sound, and styles like Rock, Pagode and Country have most of their signals scattered among a wide range of frequencies. Thus, different patterns were found among musical styles, although most use the same musical instruments to compose their songs. The implementation was separated into three stages: acquisition, processing and triggering. In the acquisition there’s the sound signal being captured by the sound sensor, where it’s filtered through a bandpass filter and processed in the microcontroller Arduino and, thus, the LEDS are activated according the song rhythm. The upper and lower cut-off frequency values of the filter were in practice consistent with those designed. Finally, the frequency calculation proved to be accurate and, in the end, the luminous response was in tune with the musical signal in all verified songs.