How narrow is narrowband?
In the audio spectrum, narrowband sounds are sounds that occupy a narrow range of frequencies. In telephony, narrowband is usually considered to cover frequencies 300–3400 Hz, i.e. the voiceband.
What is array signal processing?
Array Signal Processing (ASP) refers to the collection and manipulation of data obtained from multiple spatially distributed sensors or antennas, in an effort to extract information about the sources of signals present in the data.