Try listening to the ITDs below for 500 Hz tones and 4000 Hz tones. Which frequency do you find easier to locate using ITDs? Why do you think this is the case? If you find it very difficult, try alternating between the +/- 400 microsecond sounds and it may become easier over time (or not!).
Low-Frequency Tones (500 Hz)
High-Frequency Tones (4000 Hz)
When you have finished, click next to listen to low and high frequency Interaural level Differences
UCL Ear Institute 