Bit Expansion in Digital Loudspeakers with Oversampling and Noise Shaping

Zhang H, Busbridge SC, Fryer PA. Bit Expansion in Digital Loudspeakers with Oversampling and Noise Shaping. In: AES Convention 116. Audio Engineering Society; 2004. Paper 6094. Available from: https://aes.org/publications/elibrary-page/?id=12619

@inproceedings{Zhang2004_12619,
  author = {Zhang, Haihua and Busbridge, Simon C. and Fryer, Peter A.},
  title = {{Bit Expansion in Digital Loudspeakers with Oversampling and Noise Shaping}},
  booktitle = {AES Convention 116},
  note = {Paper 6094},
  year = {2004},
  month = may,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=12619}
}

TY  - CPAPER
TI  - Bit Expansion in Digital Loudspeakers with Oversampling and Noise Shaping
AU  - Zhang, Haihua
AU  - Busbridge, Simon C.
AU  - Fryer, Peter A.
T2  - AES Convention 116
M1  - Paper 6094
PY  - 2004
DA  - 2004/05/06
UR  - https://aes.org/publications/elibrary-page/?id=12619
PB  - Audio Engineering Society
LA  - en
AB  - The resolution of true digital loudspeakers is currently limited by their physical construction. Transducer arrays require 2 to the Nth power minus 1 speaklets and multiple voice coil topologies require N coils (N = the number of bits). Oversampling and noise shaping has been used to maintain resolution with fewer bits. Results are presented where the oversampled signal falls both within and outside of the bandwidth of the radiator. A linear model is being developed to understand the observations. The radiator displacement shows little difference between the original and oversampled cases. It is concluded that the limited bandwidth of existing acoustical radiators is advantageous in acting as the re-integration filter. In circumstances where this is not possible the auditory system may perform this task.
ER  -