Sound Meter

A Sound level meter (SLM) is an instrument used to measure sound pressure levels in decibels (dB). It helps assess noise exposure in workplaces, environmental monitoring, and product testing. The device consists of a microphone, an amplifier, and a display unit. The microphone converts sound waves into electrical signals, which are then amplified and processed. Modern meters use digital processing to provide accurate readings with frequency and time weighting (commonly A-weighting for human ear response and C-weighting for high-intensity sounds). Time response settings, such as Fast, Slow, and Impulse, allow measurement of fluctuating noise. Sound meters are classified into Class 1 (high precision) and Class 2 (general use) as per international standards like IEC 61672. They are widely used in occupational health and safety, ensuring compliance with noise regulations, protecting workers from hearing damage, and controlling noise pollution in communities and industries.