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About the application:

Android device OS7 Nougat and above required. The RedVox Infrasound Recorder captures sub-aural low frequency sound from volcanic eruptions, sonic booms, meteors, earthquakes, tsunamis, surf, and anything large that blows up. Be part of the world-wide infrasound exploration! Recording and streaming over wireless connection or cell starts as soon as you hit play. The main display shows the infrasonic pressure recorded with the internal microphone and (if accessible) barometer. Microphones plugged in through the data port or audio jack will override the internal microphone. Sound files are sent anonymously to the RedVox cloud server at redvox.io. Your apk ver and RedVox device ID is shown in the lower center of the front page, and can be changed in Settings. RedVox Recorder can record in the background to continuously monitor infrasound happenings and ambient noise. Although continued recording will consume more power, with the screen off it can run off the internal battery for a lot of hours. We can also save the place of the device so that we can correctly map the infrasound that your device is recording and perform source localization. In the absence of cell or wireless connection, Recorder will save to memory and retransmit when communications are restored if the backfill setting is on. You have access to all the files recorded in your device. Under Settings, Files, the Copy to Documents function will create these files accessible through iTunes. Continued use of GPS running in the background can decrease battery life. PRIVACY At 80 Hz, audio is low-pass filtered in the device to remove any chance of conversation or another identifiable human voicing being picked up. At 800 Hz sampling, you are within the bass guitar frequency range, so should pick up baritone voice. Could you select to use 8 kHz sampling, conversational audio should be recorded. Place can be disabled either at the Device Settings or within the Recorder Settings. In the Recorder Setting you can specify a fixed place (see EXPERT LEVEL). The RedVox Device ID is either a truncated ver of the scrambled vendor ID or user-specified in the settings. It is not traceable to any acc or private information. EXPERT LEVEL Array processing requires precise timing synchronization and sensor places. If you know the sensor place within a couple of meters and you have the RedVox Time Synch Code, you can input the fixed sensor coordinates and direct the synch process to an IP:PortNumber of your choice.