Norsonic nor1216, Инструкция по эксплуатации

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13 Norsonic Nor1216
Instruction Manual
Frequency response
The figure below shows the typical frequency re-
sponse for sound approaching the microphone in two
directions. The response marked “Vertical” is the re-
sponse for sound approaching the microphone from
above along the bird spikes, when the microphone is
in the recommended vertical direction. The response
marked “Horizontal” is the response for sound ap-
proaching the microphone in a horizontal direction
when the microphone is mounted in the same recom-
mended vertical direction.
10 100 1k 10 k 20 k
30 −
25 −
20 −
15 −
10
−
5 −
0
5
10
Vertical
Horizontal
Sensitivity level [dB]
Frequency [Hz]
Due to the lower sensitivity for higher frequencies,
as shown on the figure, it is recommended to correct
the frequency response to ensure that the response is
within the requirement for Class 1 sound level meters
specified in the international standard IEC 61672-1.
When the microphone system is used in connection
with the precision sound analyser Nor140 (for program
version 2.0 and above), just select Nor1214/Nor1216
in the input setup menu. When used with Nor118 (and
power supply) we recommend the following correc-
tions:
Vertical: Random response correction (R) and
Windscreen correction (W)
Horizontal: Random response correction (R)
Instruction for using the Nor1217 together with Nor150
is given later in this manual