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DIN EN ISO 389-9:2009-12
Acoustics - Reference zero for the calibration of audiometric equipment - Part 9: Preferred test conditions for the determination of reference hearing threshold levels (ISO 389-9:2009); German version EN ISO 389-9:2009
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Summary
Akustik - Standard-Bezugspegel für die Kalibrierung audiometrischer Geräte - Teil 9: Vorzugs-Messbedingungen zur Bestimmung von Bezugs-Hörschwellenpegeln (ISO 389-9:2009); Deutsche Fassung EN ISO 389-9:2009
Technical characteristics
| Publisher | Deutsche Institut für Normung e.V. (DIN) |
| Publication Date | 12/01/2009 |
| Page Count | 18 |
| EAN | --- |
| ISBN | --- |
| Weight (in grams) | --- |
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