Sound level meters, also known as noise meters, sound meters, or sound pressure level meters, are portable handheld devices that integrate microphones for measuring sound or noise in various settings. These acoustic measurement devices come equipped with digital displays with inbuilt memory for data storage. A sound level meter monitors and quantifies different sound levels and analyse different building acoustics, machinery noise, industrial noise, and community noise.
Sound level meters are significant tools as high noise levels can damage hearing, cause hearing loss, and harm health. The latest models of sound level meters integrate the latest technologies that can be attached to smartphones, while others require connections to different devices. It is crucial to calibrate noise meters for proper functionality and accurate readings.
Components of Sound Level Meters
The basic components of a sound level meter include:
- Microphone – A microphone captures a sound.
- Amplifier – A sound level meter houses an amplifier to increase the electrical signal from the microphone.
- Filters – Filters adjust the frequency response of the instrument.
- Display – To show the measured sound levels.
In addition, some sound level meters also have additional features such as data logging capabilities, audio recording, and advanced signal processing options.
Most Popular Types of Sound Level Meters
Several types or classes of sound level meters are available, each with unique features and applications. Some common and popular types include:
- Type 0 Sound Level Meters: These sound meters are also known as precision or laboratory-grade meters and are the most accurate and precise sound level meters. They adhere to stringent international organisations' standards and are typically employed for calibration and reference purposes.
- Type 1/ Class 1 Sound Level Meters: These sound meters are high-precision instruments that find applications in industrial and environmental noise measurements. They are commonly used for compliance testing, workplace noise monitoring, and environmental impact assessments.
- Type 2/ Class 2 Sound Level Meter: These are general-purpose sound level meters with slightly lower accuracy than Type 1. These meters are more affordable and common in noise surveys, community noise assessments, and basic industrial noise measurements.
Other Sound Level Meter Types Include
- Digital Sound Level Meters
- Multipurpose Sound Level Meters
- Low-Noise Sound Level Meters
- Occupational Noise Sound Level Meters
What Differentiates a Dosimeter from a Sound Level Meter?
Their specific functions distinguish a sound level meter and a noise dosimeter. A dosimeter or noise dosimeter is a sound level meter type that measures individual or personal noise exposure levels. In contrast, a sound level meter quantifies the noise within the whole environment.
Typical Environments for Sound Level Meters:
Sound level meters are commonly used in various fields, including:
- Environmental Monitoring
- Occupational Health and Safety
- Workplace and Industrial Settings
- Residential Areas
- Construction Sites
- Scientific and Acoustic Research.
