Bandwidth

Bandwidth is defined as a frequency span- the difference between a high frequency and a lower frequency.In sound, the word can be utilized in different ways, depending on context. As a simple example, an equalizer with cutoff frequencies (the filter's 3 dB point) of 200 Hz and 2000 Hz has a bandwidth of 1800 Hz. The audio bandwidth is generally defined as 20 Hz to 20,000 Hz, although there are harmonics that can extend far beyond 20 kHz. In situations where bandwidth is given as an audio specification, i.e. in frequency-response charts, the wider the bandwidth, the better.In audio electronics, we can compute the "Q", or Quality Factor for a filter using the bandwidth; the quality factor is defined to be the ratio of the center frequency Ä divided by the bandwidth.