The sensor to estimate the sound pressure level in eggs

Autor(es)

Donofre, Ana Carolina ^[1] ; Oliveira Da Silva, Iran Jose ^[1] ; De Castro Junior, Sergio Luis ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Dept Biosyst Engn, Luiz de Queiroz Coll Agr, ESALQ, Av Padua Dias 11, BR-13418900 Piracicaba, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: COMPUTERS AND ELECTRONICS IN AGRICULTURE; v. 154, p. 420-425, NOV 2018.
• Citações Web of Science: 2

Resumo

Before assessing the effects of sound stimuli on the embryonic development of poultry, the current study asked the following question: what sound pressure level (SPL) would embryos inside eggs be exposed to? The question has motivated the current research, which developed a reduced-size sensor (miniaturized decibel meter) to help measuring SPL inside artificially-incubated eggs (microenvironments). The sensor was developed by using the Arduino (R) microprocessor - a standard amplifier circuit and electret microphones. Calibrations were performed in a commercial decibel meter to allow confirming the sensor capacity. However, it was necessary using mathematical models to help converting the sound measures to the decibel scale, since the direct conversion of them was not possible. The use of the sensor in studies focused on artificial incubation confirmed the acoustic insulation capacity of eggshells. However, results showed that the internal SPL (air chamber) in eggs externally exposed to 90 dB (A) remains high and probably perceptible to embryos. Such information is highly relevant to studies focused on investigating bioacoustics during incubation. (AU)

• Processo FAPESP: 15/04352-4 - Estímulos sonoros na incubação de ovos fertilizados e as relações com o nascimento, desempenho fisiológico, comportamental e produtivo de pintos de corte
• Beneficiário: Ana Carolina Donofre
• Modalidade de apoio: Bolsas no Brasil - Doutorado