### Answer To maximize speech-to-text accuracy for Dutch language calls, especially in challenging conditions like hands-free car calls, you can configure the following settings: 1. Set the language parameter to Dutch Configure your agent to use

nl-NL

(Dutch - Netherlands) or

nl-BE

(Dutch - Belgium) for the language setting [(1) ]() [(2) ]() . This optimizes speech recognition specifically for Dutch. 2. Use accurate STT mode Set

stt_mode

to

"accurate"

rather than

"fast"

to prioritize transcription accuracy over speed . This is particularly important for challenging audio conditions like hands-free car calls. 3. Add boosted keywords Use the

boosted_keywords

parameter to bias the transcriber model toward specific Dutch words, names, brands, or phrases that are commonly used in your calls [(1) ]() [(2) ]() [(3) ]() . For example:

json
["retell", "kroger"]

[(1) ]() This helps the ASR model more accurately transcribe domain-specific terminology. 4. Consider denoising mode If background noise from the car environment is an issue, configure the

denoising_mode

setting to

"noise-cancellation"

to filter out ambient sounds . These configurations should significantly improve Dutch speech recognition consistency, even in challenging hands-free car scenarios where audio quality may be compromised by background noise and distance from the microphone [(4) ]() [(5) ]() .

​ To learn more, see the sources I considered: [[1] Get Agent Versions](https://docs.retellai.com/api-references/get-agent-versions) [[2] Update Voice Agent](https://docs.retellai.com/api-references/update-agent) [[3] Discord message from @erika_jane9 on 2024-09-11](https://discord.com/channels/1186424376300679209/1186462578310910112/1283435022405079153) [[4] Automatic Speech Recognition (ASR)](https://www.retellai.com/glossary/automatic-speech-recognition-asr) [[5] Speech Processing](https://www.retellai.com/glossary/speech-processing) ​

Feel free to tag @AI Evy with additional questions. I also appreciate feedback, it helps me improve.