The SV 971A is a Class 1 Sound Level Meter and Sound Exposure Meter designed for professional use, recognized for its compact size, lightweight, and inclusion of advanced features like a new microphone with a large dynamic range of 120 dB and low-power Bluetooth® connectivity for mobile application integration. The 971 series offers a wide LAeq measurement range (24 to 137 dB linear measurement range, with a Peak of 140 dB) in a single range, ensuring accuracy and ease of use for professionals in the field. Additionally, the device adds new features like RT 60 and STIPA measurements for reverberation time and speech intelligibility, supported by a separate mobile application.

Additionally, it includes a range of options and accessories to extend its capabilities, along with software support for comprehensive noise level analysis and reporting, catering to health and safety specialists’ needs. The SV 971A is equipped to handle a broad spectrum of noise measurement tasks, making it suitable for occupational noise measurements and basic environmental measurements, real-time frequency analysis, audio recording, and time-history logging, all within a device that emphasizes power efficiency and user convenience.

A Class 1 (or Type 1) Sound Level Meter is defined as a measuring device that conforms to the International Electrotechnical Commission (IEC) standard IEC 61672-1:2013, as well as its European equivalents (BS EN 61672-1:2003 in the UK and DIN EN 61672-1:2014 in Germany). These standards outline specific performance criteria that the decibel meter must meet, including a defined linear operating range, frequency response, and the ability to operate accurately across a specified temperature range. These criteria ensure the device’s precision and reliability for measuring sound levels in various professional applications, making it suitable for use in environments where accurate sound level measurement is critical.