An inexpensive sensor for noise

Response Characterization of an Inexpensive Aerosol Sensor

Inexpensive aerosol sensors have been considered as a complementary option to address the issue of expensive but low spatial coverage air quality monitoring networks. However, the accuracy and response characteristics of these sensors is poorly documented. In this study, inexpensive Shinyei PPD42NS and PPD60PV sensors were evaluated using a novel laboratory evaluation method. A continuously cha...

Evaluation of an inexpensive sensor to measure soil color

Monitoring Domestic Noise with Inexpensive Equipment

Environmental Health (EH) Departments devote considerable resources to investigating domestic noise complaints. In 1989-90 Environmental Health Officers in England and Wales received 97,798 noise complaints, of which 61% were about domestic noise [1]. The object of investigating a complaint is to determine whether a statutory nuisance exists. In practice, this depends on the judgement of the En...

An inexpensive device for transillumination.

Patients with cracked-tooth syndrome often present with a chief complaint of vague pains while eating that they cannot localize, making the diagnosis difficult. Frequently practitioners are unable to discover the cause of their symptoms, so treatment is delayed, which can result in apical propagation of the crack, leading to unrestorable vertical root fracture. Transillumination is a valuable a...

Noise an Environmental Pollutant

The harmful effect of the noise on human health has been known for many decades and it's first harmful effect on the hearing came to be known in the year 1831. According to the nature of the work, this di- sease was called Boiler Maker's deafness.  Noise due to the industrial machineries is one of the main cause of Environmental Poliution, and among the different industreis, Textile industry i...