Microphone Cartridges0 pages

Product Data
PD Mics Ed.3 Rev.0 English 03.11
Microphone Cartridges
Norsonic’s range of microphones
covers most application and can be
used as direct replacement with other
brands.
Full use has been made of modern
materials which when coupled with
traditional engineering skills produces
microphones that meet all the requirements
of the precision measurement
standards yet are robust and resistant
to corrosion. These microphones are
used in conjunction with the Norsonic
range of preamplifiers that closely
couple to them and ensure perfect
matching to the associated instrument
with minimum disturbance to the
acoustic field. The preamplifiers have
the necessary signal handling capability
and low self noise to allow full
use to be made of the wide dynamic
range of the microphones.
Calibration
Calibration of all Norsonic microphones
is directly traceable to
National and International Standards
with particular attention being paid
in the design to ensuring long term
stability. Each microphone is delivered
with an individual certificate of calibration
giving all the key information relating
to its performance. This includes
the nominal sensitivity and frequency
response along with the environmental
data that relates to the calibration.
Norsonic Calibration Laboratory is an
international accreditated laboratory.
This ensures that the quality of the
measured values are at the highest
possible level.
Free-Field Microphones
All Norsonic microphones are freefield
types. A free-field microphone is
designed to measure the sound pressure
in the sound field, compensating
for the influence of the presence of
the microphone in the sound field. In
effect, the microphone measures the
sound pressure as it existed before
the microphone was introduced in the
sound field, i.e. free-field conditions.
Applicable standard is IEC 61672
and the former IEC 60651. The freefield
microphone should be pointed
towards the sound source at a 0° angle of
incidence.
The key components that determines
the accuracy of a sound level meter is
the measurement microphone and its
associated preamplifier. The effectiveness
of these components in converting
the acoustic signal into an electrical
analogue set the maximum accuracy
that can be achieved by the ensuing
signal processing. Norsonic have a
carefully balanced range of measurement
microphones to suite a range of
applications that complement modern
instrumentation yet maintain traditional
values.