Note: If you experience any difficulty in hearing the sounds in Chrome Browser or even the latest version of Microsoft Edge Chromium, please install the extension given below. You will be able to increase the browser volume (about 6 times) under the extension settings. To install the extension, visit the link in your browser  https://chrome.google.com/webstore/detail/volume-master/jghecgabfgfdldnmbfkhmffcabddioke