Browse > Article
http://dx.doi.org/10.14346/JKOSOS.2013.28.1.024

Evaluation on Accuracy of Noise Measurement Applications for iPhone 4 and iPhone 3Gs  

Ma, Hye Ran (Department of Mechanical Systems Engineering, Hansung University)
Park, Doo Yong (Department of Mechanical Systems Engineering, Hansung University)
Publication Information
Journal of the Korean Society of Safety / v.28, no.1, 2013 , pp. 24-28 More about this Journal
Abstract
This article evaluates the accuracy of noise measurements for 37 noise measurement applications for iPhone 4 and iPhone 3Gs. Noise levels were measured using simultaneously a precision sound level meter and iPhones installed noise measurement applications at the levels of 70 dB, 80 dB and 90 dB at 1,000 Hz. Measurement errors were estimated by subtracting two measurements between iPhone and sound level meter. It was found that measurement errors of 34 applications(89.2%) were greater than ${\pm}2$ dB which is the maximum allowable error range for the Type II sound level meter. It was only 4 applications that measurement errors lie within ${\pm}2$ dB error range. There was no significant differences among measurements with four iPhone 4s. However, there were significant differences between the measurements with iPhone 4 and iPhone 3Gs using the same application. It was due to the different hardware specifications such as microphone. Therefore, noise measurement applications, for example, which has to utilize hardware of the smartphone, should be programmed to identify hardware specifications and to adopt appropriate correction factors upon hardware specifications. In conclusion, it is necessary to check accuracy and validity before using the noise measurement applications for iPhones. Also, it was suggested that it should develop an evaluation guideline or protocol on accuracy testing for the measurement applications using a smartphone.
Keywords
noise; noise measurement; sound measurement; smartphone application; iPhone apps;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
1 S. Boisvert, "An enterprise look at mHealth", Journal of Healthcare Risk Management, 32(2) pp. 44-52, 2012.   DOI   ScienceOn
2 J. S. Choi, B. Yi, J. H. Park, K. Choi, S. W. Park, and P. L. Rhee, "The Use of the Smartphone for Doctors: Empirical Study from Samsung Medical Center", Healthc Inform Res. Vol. 17, No. 2, pp. 131-138, 2011.   DOI   ScienceOn
3 J.T. Park, S.M. Chun, K.Y. Kim, "Analysis of Problems and Technological Trends of Applying Smartphone for U-healthcare", Information and Communications Magazine, 29(10), pp. 45-54, 2012.
4 B. G. Lee, W. Y. Chung, "A smartphone-based driver safety monitoring system using data fusion", Sensors (Basel), 12(12), pp. 17536-52, 2012.   DOI   ScienceOn
5 Korean Agency for Technology and Standards, "Korean Industrial Standard KS C 1502:2001, Sound level meters", Korean Standards Association.
6 Korean Agency for Technology and Standards, "Korean Industrial Standard KS C 1505:2001, Integrating-averaging sound level meters", Korean Standards Association.
7 International Electrotechnical Commission, "International Standard IEC 60651:1979. Standard for sound level meters", IEC.
8 International Electrotechnical Commission, "International Standard IEC 60804:2000. Standard for sound level meters", IEC.
9 BIPM, IEC, IFCC, ILAC, IUPAC, IUPAP, ISO, OIML, "The international vocabulary of metrology-basic and general concepts and associated terms(VIM)", 3rd edn. JCGM 200 : 2012. http://www.bipm.org/vim