Multi-Language Conversational Telephone Speech 2011 -- Turkish
Version: 1 – Released: Thu May 18 11:02:19 PDT 2017
Cataloging Information
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Data Citation Details
TitleMulti-Language Conversational Telephone Speech 2011 -- Turkish
Study Global IDhdl:11272/ACOKK
Other IDLinguistic Data Consortium: LDC2017S09; ISBN: 1-58563-799-8; ISLRN: 466-022-433-410-8
AuthorsJones, Karen; Graff, David; Walker, Kevin; Strassel, Stephanie
ProducerLinguistic Data Consortium (LDC), University of Pennsylvania
Production DateMay 15, 2017
Production PlacePhiladelphia
DistributorLinguistic Data Consortium (LDC), University of Pennsylvania
Deposit DateMay 18, 2017
SeriesLDC, Linguistic Data Consortium
Versionv1.0, May 15, 2017
Original Dataverse
Description and Scope


Multi-Language Conversational Telephone Speech 2011 -- Turkish was developed by the Linguistic Data Consortium (LDC) and is comprised of approximately 18 hours of telephone speech in Turkish.

The data were collected primarily to support research and technology evaluation in automatic language identification, and portions of these telephone calls were used in the NIST 2011 Language Recognition Evaluation (LRE). LRE 2011 focused on language pair discrimination for 24 languages/dialects, some of which could be considered mutually intelligible or closely related.

LDC has released the following as part of the Multi-Language Conversation Telephone Speech 2011 series:

  • Slavic Group (LDC2016S11)
  • Turkish (LDC2017S09)


Participants were recruited by native speakers who contacted acquaintances in their social network. Those native speakers made one call, up to 15 minutes, to each acquaintance. The data was collected using LDC's telephone collection infrastructure, comprised of three computer telephony systems. Human auditors labeled calls for callee gender, dialect type and noise. Demographic information about the participants was not collected.

All audio data are presented in FLAC-compressed MS-WAV (RIFF) file format (*.flac); when uncompressed, each file is 2 channels, recorded at 8000 samples/second with samples stored as 16-bit signed integers, representing a lossless conversion from the original mu-law sample data as captured digitally from the public telephone network. The following table summarizes the total number of calls, total number of hours of recorded audio, and the total size of compressed data:

group lng #calls #hours #MB
turkish tur 87 18.6 975

KeywordsLinguistics (ACV)
Time Period Covered2011 - 2011
Date of Collection2011 - 2011
Country/NationUnited States (US); Turkey (TR)
Kind of DataLinguistic data
Data Collection / Methodology
Data SourcesTelephone conversations
Data Availability
Number of Files 3
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Other Information
NotesInfo (DCMI type) Sound; Info (Sample type) pcm; Info (Sample rate) 8000; Info (Application) Language identificaiton; Info (Language) Turkish; Info (Language ID) tur; Info (Project) NIST LRE
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"Multi-Language Conversational Telephone Speech 2011 -- Turkish", hdl:11272/ACOKK