© NMISA 2012

Status of Acoustics, Ultrasound and Vibration at the NMISA

Ian Veldman

13 June 2012

© NMISA 2012

Recent and future developments

• Acoustics– Reciprocity calibration system in conformance with IEC 60194-2:

2009• LSP1 & LSP2• Magnitude and phase

– Acquired a commercial reciprocity calibration system to be implemented during 2012

• Vibration– Extended low frequency capability down to 0,4 Hz– Developing a system for measuring transverse sensitivity of

accelerometers in compliance with ISO 16063-31– Designed an air-bearing exciter table. Performance validation to

commence later this year

© NMISA 2012

Recent and future developments

• Ultrasound– Finalising the appointment of an Underwater

Acoustics/Ultrasound metrologist– Re-establish the NMISA underwater Acoustic National Standard– Initiate a project plan to establish Ultrasound Power

measurement standards at the NMISA

© NMISA 2012

Development & Comparison Activities

• Acoustics– Participation in CCAUV.A-K5 software validation project– CCAUV.A-K5– APMP.AUV.A-S1– Reciprocity calibration of LSP1 & LSP2 microphones

© NMISA 2012

Development & Comparison Activities

• Vibration– CCAUV.V-K2– AFRIMETS.AUV.V-S2 (Pilot laboratory)– APMP.AUV.V-S1– AFRIMETS.AUV.V-S3– Primary calibration of accelerometers < 1 Hz– Low frequency air-bearing exciter table– Transverse sensitivity calibration of accelerometers (ISO 16063-

31)

© NMISA 2010© NMISA 2012

AFRIMET Activities

• Provided training for KEBS metrologist in Acoustics and Vibration• Assist in arranging inter-laboratory comparison, AFRIMETS.AUV.V-S3

© NMISA 2010© NMISA 2012