Directivity and Sensitivity ofCell Phones: iPhone 7

Brixen EB. Directivity and Sensitivity ofCell Phones: iPhone 7. In: AES Conference: 2019 AES International Conference on Audio Forensics. Audio Engineering Society; 2019. Paper 28. Available from: https://aes.org/publications/elibrary-page/?id=20478

@inproceedings{Brixen2019_20478,
  author = {Brixen, Eddy B.},
  title = {{Directivity and Sensitivity ofCell Phones: iPhone 7}},
  booktitle = {AES Conference: 2019 AES International Conference on Audio Forensics},
  note = {Paper 28},
  year = {2019},
  month = jun,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=20478}
}

TY  - CPAPER
TI  - Directivity and Sensitivity ofCell Phones: iPhone 7
AU  - Brixen, Eddy B.
T2  - AES Conference: 2019 AES International Conference on Audio Forensics
M1  - Paper 28
PY  - 2019
DA  - 2019/06/06
UR  - https://aes.org/publications/elibrary-page/?id=20478
PB  - Audio Engineering Society
LA  - en
AB  - In modern cellular phones / smart phones, various algorithms are applied to enhance speech from nearby talkers and to reduce other sounds. From a forensic perspective, the background sounds are as valuable as the speech. This paper focuses on the evaluation of a smartphone"s ability to pickup background sounds. Initiated by casework, the question is raised whether or not analyses of the background sound provide any valid information. An iPhone 7 is examined. Sensitivity to background sounds and directivity is measured. Also, a balloon pop-test is applied. The conclusion is that the level of broadband background sounds must exceed approximately 70 dB(A) to be transmitted by the iPhone 7. The balloon popping test was carried out with five different smartphones.
ER  -