Design and Studying of the warning systerm of noise measuring
Abstract
Environmental noise monitoring, it is the mankind that improves life quality, strengthen an important link of environmental protection, in the flourishing block of every large city and residential block , there are large-scale ambient noise displays that have erected the street already. But the domestic portable noise tester at present, are mostly imported dedicated devices costing an arm and a leg, except that there are such specialized departments of environmental protection as the hygiene , measuring ,etc., unable to is it popularize to popularize as civil product. This text introduces a kind of core of regarding 89C51 one-chip computer as, adopt low cost , portable digital display ambient noise measuring apparatus that V/F switch technology formed . This working stability of instrument , performance are good, smaller than 1dB through correcting the error of measuring, it is 40 to measure the range --96dB, can meet general civil need , can apply industrial and mining enterprises , organ school ,etc. need measure ambient noise and occasion that control extensively.