Open Hardware Mobile Wireless Serial Audio Transmission Unit for Acoustical Ecological Momentary Assessment Using Bluetooth RFCOMM

Franz S, Groenewold H, Holube I, Bitzer J. Open Hardware Mobile Wireless Serial Audio Transmission Unit for Acoustical Ecological Momentary Assessment Using Bluetooth RFCOMM. In: AES Convention 144. Audio Engineering Society; 2018. Paper 439. Available from: https://aes.org/publications/elibrary-page/?id=19552

@inproceedings{Franz2018_19552,
  author = {Franz, Sven and Groenewold, Holger and Holube, Inga and Bitzer, Jörg},
  title = {{Open Hardware Mobile Wireless Serial Audio Transmission Unit for Acoustical Ecological Momentary Assessment Using Bluetooth RFCOMM}},
  booktitle = {AES Convention 144},
  note = {Paper 439},
  year = {2018},
  month = may,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=19552}
}

TY  - CPAPER
TI  - Open Hardware Mobile Wireless Serial Audio Transmission Unit for Acoustical Ecological Momentary Assessment Using Bluetooth RFCOMM
AU  - Franz, Sven
AU  - Groenewold, Holger
AU  - Holube, Inga
AU  - Bitzer, Jörg
T2  - AES Convention 144
M1  - Paper 439
PY  - 2018
DA  - 2018/05/06
UR  - https://aes.org/publications/elibrary-page/?id=19552
PB  - Audio Engineering Society
LA  - en
AB  - Acoustical Ecological Momentary Assessment (EMA) is a necessary step towards understanding noise exposure in everyday life and can also help identify obstacles in the speech understanding of hearing impaired people. Smartphones would represent a desirable tool for this task, but no simple solution has been proposed yet. Stereo audio transmission between mobile devices via Bluetooth using the Advanced Audio Distribution Profile (A2DP) is a common technique. However, due to software restrictions in Android, this profile is limited to act as a source and is prohibited from receiving a stereo audio stream. In this contribution we present a solution to transmitting uncompressed stereo audio data via Radio Frequency Communication (RFCOMM) enabling an Android smartphone to act as a receiver. Although, in contrast to A2DP, this solution is limited to stereo, 16 kHz and 16 bit, the resulting audio quality is sufficient for speech signals and acoustical measurements.
ER  -