dbA Meter
A dBA meter is an electronic device used to measure noise levels in decibels A, representing sound pressure levels with an A-weighting filter that mimics human hearing sensitivity. It consists of a microphone, a preamplifier, and circuit boards that convert sound into digital readings displayed on a screen. Various types of dBA meters are tailored for specific applications, including occupational health, environmental noise assessment, and audio engineering, each designed to provide accurate and relevant sound level measurements.
What are the different types of dBA meters and their applications?
There are three main types of dBA meters:
Class 1 (or Type 1): These meters are built according to IEC 61672-1 standards and offer high precision and accuracy, with a wide frequency range up to 20 kHz. They are used in applications requiring high accuracy, such as environmental noise assessments, building and acoustics, sound power measurements, and compliance testing according to ISO and OSHA standards.
Class 2 (or Type 2): These meters are also compliant with IEC 61672-1 but provide slightly less accuracy and a smaller frequency range, typically up to 10 kHz. They are commonly used for noise at work applications and other general-purpose measurements.
Non-compliant Meters and Apps: These are inexpensive alternatives, including smartphone applications, that do not comply with IEC standards and cannot be certified by accredited laboratories. They offer unknown accuracy and repeatability and are generally used for informal, non-critical noise measurements to assess comparative noise levels.
How can you check the compliance of a dBA meter?
To check the compliance of a dBA meter, look for a calibration certificate that adheres to IEC 61672:2013 standards. The certificate should include accuracy errors in 1/3 octave frequency bands and provide a calibration factor established with traceable calibration equipment.
What are the reliable dBA meter brands?
Reliable dBA meter brands include prestigious manufacturers like Bruel & Kjaer, Svantek, and Norsonic, each with over 30 years of experience in producing top-quality meters compliant with IEC 61672-1. Their top models include the B&K 2250, SVAN 979, and NOR 150. Mid-segment manufacturers offering reliable meters include TSI Quest (now owning Casella), Cirrus, NTI, Cesva, and Larson Davis. Additionally, brands like Pulsar, PCE, and Sinus offer less advanced but still reliable meters.
How much does a dBA meter cost?
The cost of a dBA meter varies by brand and model. Basic models from brands like Pulsar and PCE can cost up to $2000. Middle-class models from brands like Cirrus and NTI range up to $4000. High-end models from brands like Svantek and Bruel & Kjaer range from $2000 to $9000, with the most accurate models being on the higher end of the price range.
What is the best dBA meter on the market?
The best dBA meter on the market, based on accuracy, measurement range, frequency range, and measurement functionality, is the SVANTEK 979, which offers top specifications overall. However, for specific applications, such as building acoustics or sound intensity, the NOR 150 may be more suitable due to its specialized application features.
How to buy a professional dBA meter?
To buy a professional dBA meter, it is best to contact the manufacturer directly through their website and request a proforma offer. Manufacturers typically provide a range of accessories and configurations tailored to your specific application needs. Due to the high cost of the equipment, they ensure that customers get precisely what they need. It is advisable to inquire about the salesperson’s experience to ensure you receive knowledgeable assistance.