An autonomous recording unit (ARU) is a self-contained audio recording device that is deployed in marine or terrestrial environments for bioacoustical monitoring. The unit is used in both marine and terrestrial environments to track the behavior of animals and monitor their ecosystems. On a terrestrial level, the ARU can detect noises coming from bird habitats and determine relative emotions that each bird conveys along with the population of the birds and the relative vulnerability of the ecosystem. The ARU can also be used to understand noises made by marine life to see how the animals' communication affects the operation of their ecosystem. When underwater, the ARU can track the sound that human made machines make and see the effect those sounds have on marine life ecosystems. Up to 44 work days can be saved through the utilization of ARU's, along with their ability to discover more species. Design General overview A split frequency application is used to counter the wide bandwidths that create issues. This split allows for the sampling of continuous time signals along an inclusion based bandwidth with a small number of hertz to hundreds of kilo-Hertz (kHz). One band is used for lower frequencies, below 30 kHz, while the other is used for higher frequencies, above 100 kHz. The perceived signals are then put into the hard drive for storage. Broadband recording system SDA14 platform The SDA14 platform allows for signal processing in real time with a 24-bits Wideband that covers 4 analog signals. To get real time data analysis, a digital signal processor (DSP) is used with three GFlops. The data can then be distributed to different media storages alongside a programmable OEM. The system itself is autonomous with 8 to 26 volt digital converter power sources that are blended through Ethernet and serial port interfaces. The ethernet port allows for acoustic tests while in the terrain along with extra gathered data. Meanwhile, the serial port deals with the sending back of data in real time and to send master control of the system back when submerged underwater. The channel takes up around 1.8 watts of power when recording. Cetacean detection algorithm Different animals experience different sensitivities to frequencies that affect their behavior. Because of this there are multiple cetacean detection algorithms. High frequency cetacean Highly sensitive animals like harbor porpoise generate primary signals between 115 and 145 kilohertz, which requires a large sample rate (480