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Engineering research report: evaluation of smartphone sound measurement applications.

Authors
Kardous-CA; Shaw-PB
Source
Cincinnati, OH: U.S. Department of Health and Human Services, Public Health Service, Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health, EPHB 349-12a, 2013 Dec; :1-31
NIOSHTIC No.
20044048
Abstract
This report describes a pilot study to assess the functionality and accuracy of smartphone sound measurement applications (apps) and examines whether such mobile applications can be appropriately employed for occupational noise measurements. Testing was conducted in a reverberant acoustic chamber using pink noise at levels of 65-95 dB. A representative sample of smartphones and tablets on various platforms were acquired, more than 130 iOS applications were evaluated but only 10 apps met our selection criteria for functionality, measurement metrics, and calibration capability. Only 4 out of 62 Android apps partially met our selection criteria and were tested. None of the Windows-based mobile applications met our selection criteria. The results showed two iOS apps with mean differences of 0.07 dB (unweighted) and -0.52 dB (A-weighted) from the reference values. Two other iOS apps had mean differences within +/- 2dB. The Android-based apps lacked the features and functionalities found in iOS apps and showed a wide variance between the same app measurements on different devices. Overall, the study suggests that certain apps may be appropriate for use in occupational noise measurements.
Keywords
Control-technology; Noise; Noise-measurement; Analytical-instruments; Computer-models; Computer-software; Telephone-operators; Electronic-devices; Electronic-equipment; Environmental-technology; Performance-capability; Laboratory-testing; Exposure-chambers; Noise-levels; Acoustics; Occupational-exposure; Data-processing; Equipment-reliability; Sound; Hearing-level; Author Keywords: Noise; Hearing Loss; Smartphone; Apps
Publication Date
20131201
Document Type
Field Studies; Control Technology
Fiscal Year
2014
NTIS Accession No.
PB2014-105959
NTIS Price
A04
Identifying No.
EPHB-349-12a
NIOSH Division
DART
Priority Area
Construction
Source Name
National Institute for Occupational Safety and Health
State
OH
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