Calibration Values; Standards For Production And Calibration - Interacoustics PA5 Gebrauchsanweisung

5.1

Calibration values

Values used by calibration of the output levels for the applied transducers are generally found in
international, national and/or in some cases internal product standards.
It is the responsibility of the person who makes the calibration, that the correct set of values is used here.
The calibration charts for the test setup in question is used to ensure that the correct correction values are
considered.
By the initial factory calibration, it is required that the standardized output levels are reached as close as
possible, and they should in general be within a reading of ± 1 dB for all type of signals.
By follow-up control of calibration, the allowed deviation of the output levels for the common signal types
according to IEC 60645 and ANSI S3.6-2004 are:
IEC 60645
Air conduction: ± 3 dB at 125 Hz to 4000 Hz
± 5 dB at higher frequencies
5.2

Standards for production and calibration

Standards used:
For Sound Pressure Level of the loudspeaker: ISO 389-7
For Sound Pressure Level of the headphone: ISO 389
Values for Loudspeaker:
Frequency (Hz)
500
1000
2000
3000
4000
Values for Headphone TDH39:
Frequency (Hz)
500
1000
2000
3000
4000
PA5 Instructions for Use - EN
ISO 389-7 Tone
(dB re. 20 µPa)
4,0
2,0
-1,5
-6,0
-6,5
ISO 389
(dB re. 20 µPa)
11,5
7,0
9,0
10,5
9,5
ANSI S3.6-2004
± 3 dB at 125 Hz to 5000 Hz
± 5 dB at 6000 Hz and higher
ISO 389-7 NB
(dB re. 20 µPa)
3,5
0,5
-1,5
-4,0
-5,0
White Noise
in SPL
0 dB
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