Äänenpainetasomittari

Äänenpainetasomittari, often referred to as a sound level meter, is an electronic instrument used to measure the intensity or level of sound in a given environment. It typically consists of a microphone, an amplifier, a signal processor, and a display. The microphone converts sound waves into electrical signals, which are then amplified and processed to determine the sound pressure level. The result is usually displayed in decibels (dB) on a digital or analog readout.

Sound level meters are crucial tools for various applications, including noise monitoring, environmental acoustics, industrial hygiene, and audio engineering. They help assess whether noise levels comply with regulations, identify potential health risks associated with prolonged exposure to loud sounds, and calibrate audio equipment. Different types of sound level meters exist, varying in accuracy, frequency response, and features such as data logging capabilities and weighting filters (e.g., A-weighting, C-weighting) which simulate the human ear's response to different frequencies.

Proper usage of a sound level meter involves careful placement of the microphone to avoid interference and ensure accurate readings. Calibration of the instrument is also essential to maintain its accuracy over time. Standards organizations like the International Electrotechnical Commission (IEC) define different classes of sound level meters based on their performance and intended use.