If location services are enabled, the app can utilize the GPS feature to provide an exact geospatial location of the noise measurement. In addition, the app allows the user to save and share measurement data using the smartphone other communication and media features. The app also contains some basic information on noise and hearing loss prevention. The app also reports the main metrics that are of importance for proper occupational noise measurements – mainly the run time (total time), the A-weighted Equivalent Sound Level (LAeq), the Maximum Level measured during the current run time, the C-weighted Peak Sound Pressure Level (LCpeak), the Time-Weighted Average (TWA) and Dose. The weighting is user-selectable and can be accessed in the “Settings” screen. The NIOSH Sound Level Meter app has many important features, it provides a readout of the sound level using the built-in microphone (or external microphone if used) and reports the instantaneous sound level in A, C, or Z-weighted decibels. Verifying the accuracy and functionality of an Android-based app is not currently possible in the NIOSH lab.
Capability to calibrate either internal or external microphone.Includes multiple metrics, including averages such as LAeq and TWA, Max and Peak Levels, Noise Dose and Projected Dose according to NIOSH and OSHA standards, and all three major weighting networks (A, C, and Z).Meets Type 2 requirements of IEC 61672:3 SLM standard when used with calibrated external microphone.
Accurate within ± 2 dBA tested according to standards in a reverberant chamber at the NIOSH acoustics laboratory.Connects to technical support from NIOSH hearing experts.Provides the most relevant metrics found in professional sound instruments today.Provides informational screens on hazardous noise levels, conducting noise measurements, selecting a hearing protector, and hearing loss guidelines.Provides an accurate measurement of noise levels using any iOS device.Developed by experienced acoustics engineers and hearing loss experts.
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