Once a signal is detected in a certain direction (which means that something makes sound in that direction, this is called broadband detection) it is possible to zoom in and analyze the signal received (narrowband analysis).
Cando se detecta un sinal en certa dirección (o que significa que algo fai ruído en devandita dirección, ao que se chama detección de banda larga) é posible enfocar e analizar o sinal recibida (análise de banda estreita).