The most common type of noise measurement device used for initial surveys is the:

The sound level meter is widely recognized as the most common type of noise measurement device used for initial surveys because it provides an immediate and straightforward way to assess sound levels in various environments. This device measures the sound pressure level in decibels (dB) and is often utilized for quick assessments in a variety of settings, including workplaces, public areas, and residential zones.

Sound level meters are designed to capture and display sound levels effectively, making them user-friendly for environmental health specialists conducting initial noise assessments. They can provide a snapshot of the ambient noise levels and help identify whether specific locations meet regulatory standards or require further investigation.

In contrast, other options have specialized uses that may not be as applicable for initial surveys. An octave-band analyzer is used for more detailed frequency analysis of sound and is beneficial for assessing specific frequency bands but is not typically the first choice for general noise surveys. A noise dosimeter is designed for personal exposure measurement over time, which is more suitable for monitoring individual worker exposure rather than assessing the overall noise environment in a specific area. A sound analyzer, while versatile in analyzing sound characteristics, can also be more complex and less commonly used for initial assessments compared to the straightforward sound level meter.