The Accuracy of Smartphone Sound Level Meter Applications With and Without Calibration.

Conclusions: These findings suggest that some SLMAs are accurate for measuring NBN and WN stimuli within the range of 50-100 dB in sound-treated environments when calibrated. However, outcomes indicated that some SLMAs, even with calibration, overestimated low ambient noise levels and may not accurately verify quiet room environments < 50 dB for clinical services. These results should not be generalized for all smartphone types, and continued research on SLMAs using next-generation smartphone devices is warranted. PMID: 30398549 [PubMed - as supplied by publisher] (Source: American Journal of Speech-Language Pathology)

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