PMID- 16197281
OWN - NLM
STAT- MEDLINE
DCOM- 20060511
LR  - 20071114
IS  - 1092-4388 (Print)
IS  - 1092-4388 (Linking)
VI  - 48
IP  - 3
DP  - 2005 Jun
TI  - Speech recognition with the advanced combination encoder and transient emphasis 
      spectral maxima strategies in nucleus 24 recipients.
PG  - 681-701
AB  - One of the difficulties faced by cochlear implant (CI) recipients is perception 
      of low-intensity speech cues. A. E. Vandali (2001) has developed the transient 
      emphasis spectral maxima (TESM) strategy to amplify short-duration, low-level 
      sounds. The aim of the present study was to determine whether speech scores would 
      be significantly higher with TESM than with the advanced combination encoder 
      (ACE) strategy fitted using procedures that optimize perception of soft speech 
      and other sounds. Eight adult recipients of the Nucleus 24 CI system participated 
      in this study. No significant differences in scores were seen between ACE and 
      TESM for consonant-vowel nucleus-consonant (CNC) words presented at 55 and 65 dB 
      SPL, for sentences in noise presented at 65 dB SPL at 2 different signal-to-noise 
      ratios, or for closed-set vowels and consonants presented at 60 dB SPL. However, 
      perception of stop consonants within CNC words presented at the lower level (55 
      dB SPL) was significantly higher with TESM than ACE. In addition, percentage of 
      information transmitted for words at 55 dB SPL was significantly higher with TESM 
      than with ACE for manner and voicing features for consonants in the initial word 
      position. Analysis of closed-set consonants presented at 60 dB SPL revealed 
      percentage of information transmitted for manner was significantly higher with 
      TESM than with ACE. These improvements with TESM were small compared with those 
      reported by Vandali for recipients of the Nucleus 22 CI system. It appears that 
      mapping techniques used to program speech processors and improved processing 
      capabilities of the Nucleus 24 system contributed to soft sounds being understood 
      almost as well with ACE as with TESM. However, half of the participants preferred 
      TESM to ACE for use in everyday life, and all but 1 used TESM in specific 
      listening situations. Clinically, TESM may be useful to ensure the audibility of 
      low-intensity, short-duration acoustic cues that are important for understanding 
      speech, for recipients who are difficult to map, or if insufficient time 
      precludes the use of mapping techniques to increase audibility of soft sound.
FAU - Holden, Laura K
AU  - Holden LK
AD  - Department of Otolaryngology-Head and Neck Surgery, Washington University, St. 
      Louis, 63110, USA. holdenl@wustl.edu
FAU - Vandali, Andrew E
AU  - Vandali AE
FAU - Skinner, Margaret W
AU  - Skinner MW
FAU - Fourakis, Marios S
AU  - Fourakis MS
FAU - Holden, Timothy A
AU  - Holden TA
LA  - eng
GR  - R01 DC000581/DC/NIDCD NIH HHS/United States
PT  - Journal Article
PT  - Research Support, N.I.H., Extramural
PT  - Research Support, Non-U.S. Gov't
PT  - Research Support, U.S. Gov't, P.H.S.
PL  - United States
TA  - J Speech Lang Hear Res
JT  - Journal of speech, language, and hearing research : JSLHR
JID - 9705610
SB  - IM
MH  - Adult
MH  - Aged
MH  - Auditory Threshold
MH  - *Cochlear Implants
MH  - Deafness/*rehabilitation
MH  - Equipment Design
MH  - Female
MH  - Humans
MH  - Male
MH  - Middle Aged
MH  - *Speech Perception
MH  - Treatment Outcome
EDAT- 2005/10/04 09:00
MHDA- 2006/05/12 09:00
CRDT- 2005/10/04 09:00
PHST- 2004/01/07 00:00 [received]
PHST- 2004/11/15 00:00 [accepted]
PHST- 2005/10/04 09:00 [pubmed]
PHST- 2006/05/12 09:00 [medline]
PHST- 2005/10/04 09:00 [entrez]
AID - 10.1044/1092-4388(2005/047) [doi]
PST - ppublish
SO  - J Speech Lang Hear Res. 2005 Jun;48(3):681-701. doi: 10.1044/1092-4388(2005/047).