![]() In connection with the transfer of your data outside the EEA, the Administrator verifies that these entities provide guarantees of a high level of personal data protection. ![]() Some of the entities processing personal data on behalf of the Administrator are established outside the EEA. In such cases, the Administrator requires third parties to maintain the confidentiality and security of information and verifies that they provide appropriate measures to protect personal data. I declare that I have been informed that my data may be transferred to entities that process personal data on behalf of the Administrator, in particular to distributors - such entities process data on the basis of an agreement with the Administrator and exclusively in accordance with its instructions. The daily noise exposure levels measured can be also presented as the % of the daily limit, and such representation of the result is called a noise dose. In the case of occupational noise, the LEQ is measured in 8 hours of a working day and such result is referred to as the daily noise exposure level (LEX). The Equivalent Continuous Sound Level (Leq) is the most commonly used sound quantity because it has a direct relationship to the energy content of the signal. The Leq is a form of representation of the energy of the sound signal and is used to assess the level of danger to human hearing. Changes in the air pressure are detected by the membranes of measurement microphones, essential parts of sound level meters. The pressure variations produced when a sound wave propagates through the air are very small compared with the static atmospheric pressure. sound energyĪ sound is a form of energy that travels through the air in a way that causes air particles to move back and forth as the energy moves forward. ![]() This is because the human ear reacts to a logarithmic change in level, which is what the decibel scale measures. The decibel scale is more useful than the Pascal scale because it is more similar to how humans perceive loudness. Typically, a decibel scale starts from 0 dB at the threshold of hearing ( 20 uPa) to 130 dB (around 100 Pa) at the threshold of pain up to 140 dB at the threshold of hearing damage ( decibel scale download PDF) dB SLPīecause of the decibel scale, the sound measurement results are referred to as sound pressure levels SPL. decibel scaleĪ decibel scale is a representation of sound measurements relative to a reference pressure. Because of the decibel scale, the sound measurement results are referred to as sound pressure levels. ![]() The sound decibel is a logarithm scale that uses a reference of 20 uPa and compresses a large scale of Pascals to a manageable scale of decibels. To manage such a big range of variability of air pressure the decibel scale is used (dB). The units of air pressure are Pascals and the smallest change of atmospheric pressure that humans can detect is a change of 20 uPa (micro Pascals) and the highest change can go up to thousands of Pascals. The sound pressure level SPL is a sound quantity expressed in decibels dB that expresses the changes in the air pressure that produce sounds.
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