ID: com.whimsicalotter.chirpr
Version: 1.0.6
Size: 4.3 Mb
Chirpr Screen Preview
How to setup Chirpr apk for android
- For Android 4.0 or higher:Please to Settings, look down to Security, and select Unknown sources. Choosing this choice will enable to install apps download from the internet.
- For devices running on lower Android 4.0:
Please go to Settings - open the Applications option, and select Unknown sources, click OK on the popup alert.
Chirpr Details
Chirpr is a radio-free acoustic-link messenger. Instead of using radio such as wi-fi, bluetooth or cell network it uses the device's speaker and microphone to transmit your message using acoustic chirps.You can send text-based messages to nearby friends using sound.
This is a demonstration of how acoustic modems operate. Note, there is no encryption or security associated with this system at present. It is a simple message broadcast system that encodes a textual message into chirps which are then played through the speaker.
Chirpr uses Binary Orthogonal Keying (BOK) and Chirp Spread Spectrum (CSS) which translates to using up and down linear chirps to transfer information.
Any suggestions or problems please email me at WhimsicalOtter@gmail.com and let me know.
What's new in Chirpr 1.0.6
+ Android 6 now asks for microphone (AUDIO_RECORD) permission in the app rather than when installing.+ Improved transmitter constructs a wav file before playing.
+ Improved efficiency of receiver with a new independent synch symbol length. Longer synch symbol leads to improved communications.
+ Operating bandwidth has been reduced to perform better across a broader range of devices with varying frequency response in their loudspeakers.
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