The audiometer must be calibrated and checked according to the three recognised methods listed below—
| (a) | electro-acoustic calibration; |
| (b) | biological calibration; and |
| 7.1 | Electro-acoustic Calibration |
| 7.1.1 | The electro-acoustic calibration must be conducted— |
| (a) | before initial use; and |
| (b) | thereafter, at intervals not exceeding 12-months: Provided that where an audiometer is either moved from one acoustic environment to another acoustic environment or the acoustic environment where the audiometer is station is changed, that audiometer must be calibrated at least every 3-months, provided that the biological calibration is conducted after each move, prior to testing. |
| 7.1.2 | The electro-acoustic calibration must be conducted— |
| (a) | by a competent person; and |
| (b) | in accordance with SANS 10154. |
| 7.1.3 | The competent person must issue a certificate of compliance which must contain the information required in the relevant parts of SANS 10154. |
| 7.1.4 | The certificate of compliance may only be issued once any deviations or defects observed have been corrected. |
| 7.1.5 | The electro-acoustic calibration must be reconducted when any of the components of the audiometer have been replaced. |
| 7.2 | Biological Calibration |
| 7.2.1 | The biological calibration must be conducted— |
| (a) | on a weekly basis; or |
| (b) | whenever the audiometer is moved to a new acoustic environment. |
| 7.2.2 | The biological calibration must be conducted— |
| (a) | by a competent person: audiometric testing; and |
| (b) | in accordance with SANS 10154. |
| 7.2.3 | Documented evidence of the biological calibration must be kept. |
| 7.3.1 | A daily check must be conducted on the day of testing. |
| 7.3.2 | The daily check must be conducted by a competent person: audiometric testing and include at least— |
| (a) | presence of valid electro-acoustic and biological calibration evidence; and |
| (b) | verification of the frequencies and decibels to be used, using the monaural pure-tone air-conduction method on at least three of the same frequencies, until the next biological calibration is due. |
