Air quality, sound pressure level, and thermal environment of two swine nursery styles

Freitas, Letícia Cibele da Silva Ramos; Campos, Alessandro T.; Yanagi, Tadayuki; Schiassi, Leonardo; Andrade, Rafaella Resende

doi:10.5935/1806-6690.20180024

Cited by 1 publication

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“…Engenharia Agrícola, Jaboticabal, v.40, n.3, p.266-271, may/jun. 2020 Results ranging between 71-76 BGHI were found in thermoneutral piglets in the nursery phase by Freitas et al (2018), by calculating comfort BGHI based on the recommendations of Amaral et al (2006). These results are close to those found in the present study (71.6-75.8).…”

Section: Discussionmentioning

confidence: 99%

Using Sounds Produced by Pigs to Identify Thermoneutrality Zones for Thermal Environment Assessment Ratios

et al. 2020

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Although dry bulb temperature (T) is the environmental variable most commonly used to classify thermal comfort in pigs, environmental assessment ratios provide more accurate information. The objective of this study was to correlate the sound pressure levels (SPL) produced by piglet vocalization with the thermal environment observed during the nursery phase, and subsequently establish thermoneutrality ranges. The experiment was conducted on a pig farm where T, relative humidity (RH), and SPL data were recorded between 9 am-5 pm for 42 days. The association between SPL and T in nursery phase piglets was verified; for thermal comfort to be possible, SPLs were 56.3 to 60.3 dB. The SPLs were subsequently used in predictor equations of ratios, and thermal comfort ranges were 74.4-78.3 for temperature and humidity ratio (THI), and 71.6-75.8 for globe temperature and humidity ratio (BGHI). Although the SPL proved to be a convenient indicator of thermal comfort for the evaluation of pigs, further studies developed in different phases of the production system are required.

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Section: Discussionmentioning

confidence: 99%