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Boundary microphones
Boundary microphones are a recent innovation, being produced
commercially in the early 1980s. They were developed and
manufactured by Crown who used the proprietary name
pressure zone microphone (PZM). Other manufacturers are
now making them.
The operating principle is acoustic, so microphone capsules
of varying type and quality may be used by different
manufacturers. Caution must thus be exercised, as
disappointing results may be due to an inferior capsule or its
housing rather than any fault of the principle. Like other types
there are good and bad examples.
Undoubtedly the boundary microphone offers many
advantage ...