The "Text To Speech" app. allows your browser to read Thai text you paste into it, either phrase by phrase, or as a continues passage.
Paste the text you would like to be spoken into the text box. If you're not automatically taken to the "speech" page, click on the "Process" button.
To hear an individual phrase, click on the phrase; to hear the whole text, click on the "Play All" button. The current phrase will be highlighted in purple. When playing the entire text you can click on the "Stop" button to cancel the operation.
To blur text, select the "Blur Text" option. To clear the blurring on a single phrase, double click on the phrase. (This will, unfortunately, play the phrase again. To avoid this, hold down the "control" key when double clicking.
To clear the text and return to the input page, click on the "Reset" button.
To practice listening, paste a passage of your choice and select the "Blur text" option. Now, click on an individual phrase to hear it. When you think you know what's been said, ctrl-double click on the phrase to unblur the text. Click on the phrase again if you'd like to hear it again. Then move on to the next phrase.