Definitions for "Bessel"
Crossover with low-pass filters of linear phase response and a monotonically decreasing passband amplitude response (it starts rolling off at DC and continues throughout the passband). Linear phase response (phase shift vs. frequency) results in constant time-delay (all frequencies within the passband are delayed equally). Consequently there is no overshoot or ringing resulting from a sudden transition between signal levels. The drawback is a slower frequency roll-off rate.
A filter type with a Q = 0.58 that produces a nearly flat amplitude response and group delay with a Ã?5 to-7 _ dB crossover point.
A crossover design that places emphasis on phase and transient response over reducing ripple.
Bessel is a small lunar crater that is located in the southern half of the Mare Serenitatis. Despite its size, this is the largest crater to lie entirely within the mare. It lies to the north-northeast of Menelaus crater.
German mathematician and astronomer who made accurate measurements of stellar distances and who predicted the existence on an 8th planet (1784-1846)