 Hello everyone, my name is Chen and welcome to our presentation. I'm going to present our study about smartphone-based hearing tests for virtual hearing clinic influence of ambient noise on the absolute threshold and loudness scaling at home. As we all know that typically we don't have a sound attenuated boost in our home, therefore it normally we will have some ambient noise in such an environment and the ambient noise typically can influence the measurement outcomes. For example it can direct masking the test stimulus and it can destruct our participants, therefore we need to to avoid the negative impact of the ambient noise. From the earlier studies we know that we can measure the noise level, we can monitor it and we can control it. Therefore we propose our first research question. Is it feasible to perform smartphone-based hearing tests remotely at participants home if the background noise is considerably low? And our second research question would be for the loudness scaling test which influence the small light higher loudness category. In our study design we did a repeated measure, we designed a repeated major experiments in in 15 subjects. So we have we have an input environment as a reference and we have our home environment and in the home environment the subjects need to check and record the real-time noise level using the decibo-x and ensure that the value was lower than our recommended limit. So you can see here was the here was the user interface of the app and there there will be a values. This is a real-time the red shows the real-time values and you can read it and to check if it's high or low and the results of measuring to environments were compared and we expect that the difference is to be small and clinical torrent. So if there are any questions about the results please comment, visit or talk. Thank you very much for your attention.