Richard Barham and Mike Goldsmith 2007 Metrologia 44 210 doi:10.1088/0026-1394/44/3/007
Richard Barham and Mike Goldsmith
Show affiliationsNPL has chosen to use the laser pistonphone as the basis for some of its measurements for international key comparison CCAUV.A-K2. The other laboratories taking part in the key comparison have all used the reciprocity technique for their low-frequency measurements, thus the use of a laser pistonphone allows the verification (or otherwise) of this technique at low frequencies. Since the use of this device for the calibration of microphones is not currently included in international standards, this paper describes this calibration method and gives a full account of the associated measurement uncertainty. While the NPL laser pistonphone has existed since the 1970s, its true value to the international community is only now being revealed.
This paper also provides the necessary background information to support the key comparison data when they are eventually published.
Issue 3 (June 2007)
Received 15 November 2006
Published 14 May 2007
Richard Barham and Mike Goldsmith 2007 Metrologia 44 210
Aaron N Johnson et al 2003 Metrologia 40 211
Rogerio T Ramos et al 2001 Meas. Sci. Technol. 12 871
M Lightman et al 2006 J. Phys.: Conf. Ser. 32 58
Li Qin et al 2008 Chinese Phys. B 17 726
Ryutaro Takahashi et al 2002 Class. Quantum Grav. 19 1599
M A Shahzamanian et al 2007 Supercond. Sci. Technol. 20 640
Jinliang Xu et al 2005 J. Micromech. Microeng. 15 1344
Bruce I Cohen et al 1998 Plasma Phys. Control. Fusion 40 75
A J M Medved 2005 Class. Quantum Grav. 22 133