We offer equipment for set-up of acoustic or sound calibration laboratory that complies with relevant standards.
What is calibration?
Calibration refers to assessing the accuracy of a measurement device by comparing it to a standard of known accuracy. It is defined as “the documented comparison of the measurement device to be calibrated against a traceable device” (that is, a reference standard).
How confident are we calibration is accurate?
The standard are used in the calibration process has been periodically calibrated using another standard which eventually can be traced directly to a standard maintained by a National Metrology Institute.
What is accreditation?
Accreditation is a process a calibration laboratory uses to demonstrate competency. It certified that the calibration lab uses appropriate metrology principles and possesses the equipment, procedures, and technical competence to provide valid measurement results. This accreditation is obtained under ISO 17025 Testing and calibration laboratories. Independent experts will confirm that the calibration laboratory has been examined, audited, and found to operate according to ISO 17025 and has the capability to consistently issue technically valid and accurate calibration reports.
What is traceability?
Traceability is obtained by following accurate procedures and document the results (including deviations and uncertainties) of the calibration process. It is executed through an unbroken chain of calibrations to National or International standards. The calibration certificate lists the standards used to calibrate an instrument and this represents the first relationship in the traceability chain.
If a calibration is carried out on an instrument and the reference device cannot be traced to a known standard, then the calibration is effectively and functionally valueless because the reference device may be deemed inaccurate.
The authority that grant accreditation to a calibration lab requires that the standards being used are in turn calibrated by another accredited lab to establish and demonstrate the integrity of the traceability chain.
Related standards to acoustic or sound calibration laboratory set-up are:
- ISO/IEC 17025 Testing and calibration laboratories
- IEC 61672-1:2013 Electroacoustics – Sound level meters – Part 1: Specifications
- IEC 61672-2:2013 Electroacoustics – Sound level meters – Part 2: Pattern evaluation tests
- IEC 61672-3:2013 Electroacoustics – Sound level meters – Part 3: Periodic tests
- IEC 61260-1:2014 Electroacoustics – Octave-band and fractional-octave-band filters – Part 1: Specifications
- IEC 61260-2:2016+AMD1:2017 Electroacoustics – Octave-band and fractional-octave band filters – Part 2: Pattern evaluation tests
- IEC 61260-3:2016 Electroacoustics – Octave-band and fractional-octave-band filters – Part 3: Periodic tests
- IEC 61094-4:1995 Measurement microphones – Part 4: Specifications for working standard microphones
- IEC 61094-6:2004 Measurement microphones – Part 6: Electrostatic actuators for determination of frequency response
- IEC 60942:2017 Electroacoustics – Sound calibrators
- IEC 61252:1993+AMD1:2000+AMD2:2017 Electroacoustics – Specifications for personal sound exposure meters