NIOSH Sound Level Meter 1.2.6

This app is an award-winning tool that combines the best features of sound level meters and noise dosimeters into a user-friendly package. It was developed by experienced acoustics engineers and hearing loss experts, ensuring its reliability and accuracy.

One of the standout features of this app is that it's completely free, without any annoying ads, limited features, or in-app purchases. This makes it accessible to anyone in need of a sound measuring tool.

The accuracy of this app has been thoroughly tested and validated with an impressive accuracy of ± 2 dBA. This was done according to standards in a reverberant chamber at the NIOSH acoustics lab, which is considered the gold standard for accuracy validation.

Not only does this app come from a trusted source with world-class expertise in noise and hearing research, but it also meets Type 2 requirements of IEC 61672:3 SLM standard when used with an external microphone. This ensures that it meets industry standards for sound measurement.

In terms of functionality, this app provides all the relevant metrics found in professional sound instruments. It includes averages such as LAeq and TWA, Max and Peak Levels, Noise Dose and Projected Dose according to NIOSH and OSHA standards. Additionally, it offers all three major weighting networks (A, C, and Z).

Another notable feature is the capability to calibrate either the internal or external microphone. Additionally, users can easily report and share data from the app.

Included within the app are up-to-date informational screens that provide guidance on what noises are considered hazardous, how to conduct a noise measurement correctly, how to select a suitable hearing protector, and guidelines for preventing hearing loss. All this information is conveniently available at your fingertips.

If users encounter any issues or have questions, they can rely on the excellent and timely support provided by NIOSH hearing experts.

Furthermore, this app supports integration with Apple's Health app, specifically the Hearing section.

For those seeking additional resources, they can find instructional videos, a user manual, a science blog, FAQs, and information on how to interpret results on the NIOSH SLM website at https://www.cdc.gov/niosh/topics/noise/app.html.