Tapping machines are commonly used for noise transmission measurements such as test of general impact noise in dwellings in floors and stairs of buildings. Qsources Qtap is a remote controlled and battery powered tapping machine with a low weight of only 8.8 kg. Qtap ensures a correct tapping frequency and high precision fall timing. The high quality, aluminium housing ensures the machine is robust enough to allow measurements in diverse construction sites. Easy transportation is guaranteed due to the machine's light weight and the included soft carry case. Qtap complies to diverse international standards such as ISO 16283-2, 717-2, 140 and ASTM E492.