To listen to a sound in a list, simply click on a sound and it will start playing. You can also use the up and down arrow keys on your keyboard to select sounds and the spacebar to start and stop playback.
Once a sound is playing, you can click on the waveform to skip through to different sections of the sound.
Select the loop icon and the sound will continuously loop, or select the autoplay icon located to the right of the loop icon and the next sound in the list will automatically load and play until the end of the list is reached or playback is stopped.