West Bengal · Speech data collection
Speech Data Collection in Kolkata
Recruited-speaker speech corpora recorded to a written specification: scripted prompts, spontaneous monologue, or both, with full speaker metadata. In Kolkata, this runs from our local studio setup: Treated booth plus transcription team co-located for fast turnaround.
- City
- Kolkata, West Bengal
- Languages here
- 4
- Turnaround
- 3-6 weeks for 100-500 hours in a single language; multi-language programmes run in parallel.
Languages recorded in Kolkata
- Bengali
- Hindi
- Indian English
- Urdu
Local dialect profile
Rarhi standard Bengali in cholit register, with heavy English mixing in professional speech.
Primary Indian Bengali pool; North Bengal varieties require Siliguri fielding.
Technical specification
| Parameter | Standard |
|---|---|
| Sample rate | 48 kHz capture, delivered at 48/16 kHz as required |
| Bit depth | 24-bit capture, 16-bit PCM delivery |
| Format | WAV (PCM), one file per utterance or per session |
| Channels | Mono per speaker; multi-channel on request |
| Noise floor | Studio sessions below -50 dBFS; field sessions specified per project |
| Clipping | Zero tolerance; clipped takes are re-recorded, not repaired |
Process
- Requirement lock: languages, hours, speaker count, demographic quotas, recording conditions
- Prompt design and linguistic review by native reviewers
- Speaker recruitment and screening against quota, with consent capture
- Recording sessions with real-time level and prompt-coverage monitoring
- Automated technical QA on every file (SNR, clipping, duration, silence)
- Native-speaker content QA on a defined sample, escalating to 100% on failure
- Packaging, manifest generation and delivery
Deliverables
- Audio files in the agreed format and naming convention
- Per-utterance manifest (speaker ID, prompt ID, duration, condition)
- Speaker metadata: age band, gender, region, dialect, education band
- Consent records mapped to speaker IDs
- QA report with pass rates and rejection reasons
Why Kolkata for this work
Primary Indian Bengali pool; North Bengal varieties require Siliguri fielding.
Treated booth plus transcription team co-located for fast turnaround. Sessions here follow the same template as every other city in the network, so a multi-city cohort stays acoustically consistent.
Frequently asked
Do you have a studio in Kolkata?
Treated booth plus transcription team co-located for fast turnaround.
Which languages can you collect in Kolkata?
Bengali, Hindi, Indian English, Urdu. Other languages are possible where migrant communities are present, with residence and nativeness screening.
Can sessions run outside the studio?
Yes. Field recording in homes, vehicles and public spaces is available where your deployment conditions require it, with noise profiles documented per session.
Book speech data collection in Kolkata
Send the language, speaker count and conditions.