Android device connecting technologies available for development [closed]

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I have searched a lot over internet about device to device connecting technologies in other words device to device connection implementation in the concern of hardware and software.

Someone please tell me a whole list of technologies available for the connection between two specific android device, no matter what hardware specification they have in them.

I want a overview over those technology which are used to make data transfer between two devices using wireless connection, Like : Wifi, Bluetooth, etc.

This question i am asking because of client asking me about a "Acoustic sound technology". I don't know about it and neither i found something related to it.

Help will be appreciated.

EDIT Now i know that it is Ultrasonic data transfer which uses device's mic to generate a sort of sound frequency and get the data on the behalf of that frequency, i don't know exactly about that's why i asked it here.

Sorry if it difficult to understand, I am a little bad at English.

Answer 1

Hardware layer of connectivity limited by common device modules: Wi-Fi, Bluetooth, NFC, Camera<->Display and Microphone<->Speaker. Each module has it's own software data transferring methods. I think that your client meant ultrasonic data transfer. Basically this method based on high-frequency signals which are emitted by speaker of one device and received by microphone of another device. For instance Yamaha uses ultrasound in InfoSound technology.