Hearing-aid automatic gain control adapting to two sound sources in the environment, using three time constants
2004 (English)In: Journal of the Acoustical Society of America, ISSN 0001-4966, E-ISSN 1520-8524, Vol. 116, no 5, 3152-3155 p.Article in journal (Refereed) Published
A hearing aid AGC algorithm is presented that uses a richer representation of the sound environment than previous algorithms. The proposed algorithm is designed to (1) adapt slowly (in approximately 10 s) between different listening environments, e.g., when the user leaves a single talker lecture for a multi-babble coffee-break; (2) switch rapidly (about 100 ms) between different dominant sound sources within one listening situation, such as the change from the user's own voice to a distant speaker's voice in a quiet conference room; (3) instantly reduce gain for strong transient sounds and then quickly return to the previous gain setting; and (4) not change the gain in silent pauses but instead keep the gain setting of the previous sound source. An acoustic evaluation showed that the algorithm worked as intended. The algorithm was evaluated together with a reference algorithm in 4 pilot field test. When evaluated by nine users in a set of speech recognition tests, the algorithm showed similar results to the reference algorithm.
Place, publisher, year, edition, pages
2004. Vol. 116, no 5, 3152-3155 p.
Algorithms, Gain control, Speech recognition, Transients
Engineering and Technology
IdentifiersURN: urn:nbn:se:kth:diva-13336DOI: 10.1121/1.1793207ISI: 000225331500044ScopusID: 2-s2.0-9644295746OAI: oai:DiVA.org:kth-13336DiVA: diva2:324128
QC 20100614 QC 201109142010-06-142010-06-112011-09-14Bibliographically approved