Cablu internet 10m altexIf a duct dimension is an odd number, round up to the next even number. 1.3. IL data for airflow velocities available on request. Forward and reverse flow are defined as follows: Forward Flow: airflow in the silencer is in the same direction as the noise propagationFlutter page transition exampleGeonoise Noise registration instruments and software Geonoise Thailand Co., Ltd. Address: 6/54-56 Poemsin Soi 4210220 Sai Mai, Bangkok, Thailand Phone: (+66) 02-1214399 Sonivent HVAC noise calculation software, ventilator unit, duct. Easy to use interface for noise prediction of HVAC installations, air handling units. The software calculations are based on theoretical acoustic properties of ...