+44 330 818 7254The design of a tropical acoustic exposimeter utilising the strain gauge concept involves a vast amount of technical concerns. The design parameters must be carefully chosen, and modelling must be done in a way that results in a robust, affordable, portable, and sensitive device that is equivalent to existing designs. We have made an effort to modify popular radiation force balancing schemes to account for factors unique to tropical environments. Our research has shown significant differences in the specifications for an ideal liquid medium, the physical and isotropic characteristics of cantilever materials, the selection of target angle and material, as well as accurate electrical circuitry (Anson LW et al., 1981). As innovative adaptations for a prospective tropical model, it has been proposed to treat water with sodium aluminium sulphate, utilise polystyrene and duraluminum as cantilever materials, and carefully choose and attach the strain gauges. We sought to design an experimental model by utilising the technical concerns stated in this study, drawing on the expertise of other writers, and making exact alterations to the construction of appropriate cantilever arms. Our design has sensitivity of 2.13mV/ watt and 1.47mV/watt correspondingly using cantilever arms manufactured of locally accessible materials, namely polystyrene and duraluminum with dimensions of 100 x 5 x 0.6mm and 100 x 5 x 0.6mm. With detection threshold of 128mW and a power range of roughly 6.1watts for both arms. Our system offers possibilities for a successful design of an acoustic exposimeter for use in tropical environments, especially with minor adjustments to the electrical circuitry and the use of locally accessible materials like polystyrene and duraluminium (Perkins MA 1989).
In order to measure the full communications spectrum and identify multiple sources of electromagnetic fields using the same communications band, a novel, compact device with spectrum analyzer characteristics has been developed. The device can record the entire spectrum from 78 MHz to 6 GHz and measure the maximum power received in multiple narrow frequency bands of 300 kHz. The suggested device enables the assessment of the cross-talk effect, which leads to inaccurate electromagnetic field estimates in traditional exposimeters. The instrument was tested against a portable spectrum analyzer in a residential area after being calibrated for farfields in an anechoic room. A substantial connection between the two devices was discovered, and a confidence level greater than 95% was attained; this suggested that the device would be useful for studying electromagnetic fields (Phillips JL et al., 2009).
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