“…Research studies have reduced the cost of acoustic monitoring by re-purposing existing technologies (Gross, 2014), or implementing devices based on open-source modular computers with external sensors of fit-for-purpose quality. Recent examples include PAM devices built around the Raspberry Pi computer (Caldas- Morgan, Alvarez-Rosario, & Padovese, 2015;Sankupellay et al, 2016;wa Maina, Muchiri, & Njoroge, 2016) and Arduino computer (Razali et al, 2015;Shafiril, Yusoff, & Yusoff, 2016). For example, the Solo acoustic monitoring platform is based on the Raspberry Pi and an external microphone (Whytock & Christie, 2017), and costs just under ∼US$100.…”