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. (Source: American Journal of Speech-Language Pathology)

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