A diagnostic test that measures the airtightness of a building. A calibrated fan is used to depressurise or pressurise the building, and the resulting airflow is measured to determine the air leakage rate.
Sound Pressure Level (SPL)
SPL, an essential metric in acoustics, measures the intensity of sound waves. It quantifies how loud a sound is and is typically expressed in decibels (dB). Understanding SPL is crucial in various applications, from audio engineering to noise pollution control.