Instruction (referring to the pages which follow the instructions below):
The demo starts with a presentation of three successively louder noise bursts. These are meant to be used to set the volume controls of your system to a comfortable listening level. When you press the 'Start' button two sounds (noise bursts) are presented. Your task is to compare the loudness of the two sounds using one of them, in this case the first sound as the reference (often called 'standard' in perception research) The loudness of the standard is arbitrarily assigned the number 100, and your task is to judge the loudness of the test sound using this number as the reference. A sound perceived as being twice as loud should thus receive the scale value 200 and a sound half as loud 50. Write the perceived loudness of the test sound in the response window below the button and proceed to the next presentation. The technique used here, comparing two sounds, is called a pair-wise comparison test.

In this demo it does not actually matter what numbers you enter in the response window and the results presented are not based on your own responses. The component that computes the results has been excluded from this demo for practical reasons.

The 'Send in' and 'Group result' buttons do not work in this demo.

Click here to start the demo!