A comparative study of the transmission parameters of the sound of mosquito predators and EMR

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dc.contributor.author Maweu, Onesmus M.
dc.contributor.author Mang’are, P. A.
dc.contributor.author Ndiritu, F. G.
dc.contributor.author Vulule, J. M.
dc.date.accessioned 2015-03-24T08:04:42Z
dc.date.available 2015-03-24T08:04:42Z
dc.date.issued 2012
dc.identifier.citation International Journal of Biophysics 2012, 2(4): 53-67 en_US
dc.identifier.uri http://article.sapub.org/pdf/10.5923.j.biophysics.20120204.01.pdf
dc.identifier.uri http://repository.seku.ac.ke/handle/123456789/1101
dc.description DOI: 10.5923/j.biophysics.20120204.01 en_US
dc.description.abstract The wide bandwidth EMR ultrasound, exploited in mosquito repellency, yielded only 20 % effectiveness. Due to this wide bandwidth, ultrasound from Amolops tormotus and Coleura afra, mosquito predators, was investigated. The sound was recorded, filtered and anaysed by Avisoftsoftware; transmission parameters determined and compared with those of EMR. Spectrogramanalysis showed harmonics, FM and CFcomponents.The fundamental frequency ofA. tormotus and C. afra sound was 5.371 kHz and 6.836 kHz respectively. The bandwidth of unfiltered sound of A. tormotus and C. afra was 10.98 kHz and 17.71 kHz respectively. The maximum peak amplitude of unfiltered sound of A. tormotus and C. afra was 135.19 dB SPL and 134.97 dB SPL; maximum acoustic energy was 19.57 Pa2 s and 35.80 Pa2 s respectively. Maximum acoustic energy of A. tormotus and C. afra sound was 10.843 Pa2 s and 14.857 Pa2 s recorded in 35-60 kHz and 10-34 kHz ranges respectively. Optimum acoustic parameters included 58.5 kHz peak frequency, 12.32-10.84 Pa2 s acoustic energy, 19.40-19.85 kHz bandwidth, 55.13-55.48 kHz and 34.66-44.26 kHz as mean maximumand minimum frequency respectively, 134.08-134.28 dB SPL peak amplitude and 132.06-133.27 dB SPL minimum peak amplitude; bandwidth significantly narrowed from EMR. These parameters are critical in realizing effective EMR. en_US
dc.language.iso en en_US
dc.subject Peak Amplitude en_US
dc.subject Signal Power en_US
dc.subject Bandwidth en_US
dc.subject Malaria en_US
dc.subject Electronic Mosquito Repellent en_US
dc.subject Acoustic Energy en_US
dc.subject Fundamental Frequency en_US
dc.title A comparative study of the transmission parameters of the sound of mosquito predators and EMR en_US
dc.type Article en_US


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