The strong point of the recently
puhlished 'surround-sound subwoofer'
is that its frequency response
is straight down to
20 Hz. Such excellence has another
side as well, however. In
the article mentioned, it was
achieved hy additional amplification
of the low tones, rising to
as much as 10 dB at 20 Hz. This
means that there is still appreciable
amplification below
20 Hz: it is only below 10 Hz
that attenuation begins to
occur.
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