A French press is a type of coffee pot formed by a large glass cylinder with a flat filter attached to a long pull/handle on the lid.
In 1929 Edward Norton designed the mechanical parts of a phonograph to behave as a maximally flat filter, thus anitcipating the electronic Butterworth filter.
So can the Butterworth (maximally flat) filter, although this was an independent discovery by Stephen Butterworth arrived at by a different method.
Due to differences in attenuations between the central and peripheral regions, commercial CT scanners are commonly equipped with a beam-shaping filter or bow-tie filter instead of the flat filter [ 22, 23].
Norton's mechanical design predates the paper by Butterworth who is usually credited as the first to describe the electronic maximally flat filter.
In the flat filter configuration, longer dwelling times of compounds on the TiO2 surface were attained by reducing the recirculation airflow by a factor of ∼5, leading to increasing total pollutant removal efficiency from 5%to44%4%.
By a flat response we mean that the summated responses of all the gammatone filters do not vary with frequency.
It is covered by a flat roof.
Moderate income tax cuts are followed by a flat economy.
This can be prevented by putting a flat sponge, or layers of appropriately cut filter paper into the plate.
