PMID- 30710956
OWN - NLM
STAT- In-Data-Review
LR  - 20190203
IS  - 1520-8524 (Electronic)
IS  - 0001-4966 (Linking)
VI  - 145
IP  - 1
DP  - 2019 Jan
TI  - Conversational speech levels and signal-to-noise ratios in realistic acoustic
      conditions.
PG  - 349
LID - 10.1121/1.5087567 [doi]
AB  - Estimating the basic acoustic parameters of conversational speech in noisy
      real-world conditions has been an elusive task in hearing research. Nevertheless,
      these data are essential ingredients for speech intelligibility tests and fitting
      rules for hearing aids. Previous surveys did not provide clear methodology for
      their acoustic measurements and setups, were opaque about their samples, or did
      not control for distance between the talker and listener, even though people are 
      known to adapt their distance in noisy conversations. In the present study,
      conversations were elicited between pairs of people by asking them to play a
      collaborative game that required them to communicate. While performing this task,
      the subjects listened to binaural recordings of different everyday scenes, which 
      were presented to them at their original sound pressure level (SPL) via highly
      open headphones. Their voices were recorded separately using calibrated headset
      microphones. The subjects were seated inside an anechoic chamber at 1 and 0.5 m
      distances. Precise estimates of realistic speech levels and signal-to-noise
      ratios (SNRs) were obtained for the different acoustic scenes, at broadband and
      third octave levels. It is shown that with acoustic background noise at above
      approximately 69 dB SPL at 1 m distance, or 75 dB SPL at 0.5 m, the average SNR
      can become negative. It is shown through interpolation of the two conditions that
      if the conversation partners would have been allowed to optimize their positions 
      by moving closer to each other, then positive SNRs should be only observed above 
      75 dB SPL. The implications of the results on speech tests and hearing aid
      fitting rules are discussed.
FAU - Weisser, Adam
AU  - Weisser A
AD  - Department of Linguistics-Audiology Section, Macquarie University, Australian
      Hearing Hub-Level 3, 16 University Avenue, New South Wales 2109, Australia.
FAU - Buchholz, Jorg M
AU  - Buchholz JM
AD  - Department of Linguistics-Audiology Section, Macquarie University, Australian
      Hearing Hub-Level 3, 16 University Avenue, New South Wales 2109, Australia.
LA  - eng
PT  - Journal Article
PL  - United States
TA  - J Acoust Soc Am
JT  - The Journal of the Acoustical Society of America
JID - 7503051
EDAT- 2019/02/04 06:00
MHDA- 2019/02/04 06:00
CRDT- 2019/02/04 06:00
PHST- 2019/02/04 06:00 [entrez]
PHST- 2019/02/04 06:00 [pubmed]
PHST- 2019/02/04 06:00 [medline]
AID - 10.1121/1.5087567 [doi]
PST - ppublish
SO  - J Acoust Soc Am. 2019 Jan;145(1):349. doi: 10.1121/1.5087567.