## 5 Lessons from International Data Collection
### Translation  
Regarding the on-site soundscape survey, the translation of the questionnaires (and in particular the perceptual adjectives used for the soundscape appraisal) is a key point to consider when using the protocol in regions where English is not the local language. Indeed, while the ISO/TS 12913-2:2018 document from which the soundscape-related questions of this protocol are derived aims at providing standardized scales, it does not provide official translations in languages other than English. Some perceptual constructs are difficult to render in different languages and people might assign different meanings to them (e.g, [51; 52; 53; 54]). For this reason, in the soundscape research community, there is a growing interest in testing and validating reliable translation of the ISO soundscape adjectives [24], which will hopefully lead to a wide-spread use of this soundscape tool. It is expected that these validated translations could simply be substituted for their English counterparts in this protocol, when they become available.  
Please find the link to the Soundscape Indices (SSID) ERC-funded website at: [[https://www.ucl.ac.uk/bartlett/environmental-design/soundscape-indices-said](https://www.ucl.ac.uk/bartlett/environmental-design/soundscape-indices-said)]([https://www.ucl.ac.uk/bartlett/environmental-design/soundscape-indices-said](https://www.ucl.ac.uk/bartlett/environmental-design/soundscape-indices-said)).  
Conceptualization, A.M., T.O., F.A., and J.K.; methodology, A.M., T.O., F.A., M.E., M.L., and J.K.; validation, A.M., T.O., M.E., M.K., and M.L.; investigation, A.M., T.O., F.A., M.E., M.K., and M.L.; resources, T.O., F.A., and J.K.; data curation, A.M. and T.O.; writing--original draft preparation, A.M.; writing--review and editing, A.M., T.O., F.A., and J.K.; visualization, A.M.; supervision, J.K.; project administration, F.A. and J.K.; funding acquisition, J.K. All authors have read and agreed to the published version of the manuscript.  
This project has received funding from the European Research Council (ERC) under the European Union's Horizon 2020 research and innovation programme (Grant Agreement No. 740696, project title: Soundscape Indices--SSID). More information and related publications can be found at the CORDIS webpage of the project: [[https://cordis.europa.eu/project/rcn/211802/factsheet/en](https://cordis.europa.eu/project/rcn/211802/factsheet/en)]([https://cordis.europa.eu/project/rcn/211802/factsheet/en](https://cordis.europa.eu/project/rcn/211802/factsheet/en)).  
The authors would like to thank our partner research groups, particularly those in Universidad de Granada, Harbin Institute of Technology, Harbin Institute of Technology (Shenzhen), Shenyang Jianzhu University, Tianjin University, Northwest A&F University, Huazhong University of Science and Technology, and Chongqing University for their valuable feedback and for their data collection efforts. We would also like to thank the Masters students, visiting researchers, and other PhD students at UCL who have helped contribute to the refinement of this protocol and collection of the current database. Study data were collected and managed using REDCap electronic data capture tools hosted at University College London (UCL) [55; 56], REDCap (Research Electronic Data Capture) is a web-based software platform designed to support data capture for research studies.  
The authors declare no conflict of interest.  
The following abbreviations are used in this manuscript:  
SSID Soundscape Indices  
FOA First Order Ambisonics* PAQ & Perceived Affective Quality
* ERC & European Research Council
* VR & Virtual Reality
* QUE & Questionnaires
* VID & 360\({}^{\circ}\) Video
* PIC & Site Pictures
* BIN & Binaural Recording
* AMB & Ambisonic Video
* SLM & Sound Level Meter
* ENV & Environmental Data