Home. Mmercial Acoustic Panels and Diffusors. HyperPhysics. Equal loudness contours and audiometry - Test your own hearing. Repeat: do not start in the top third of the chart. How to use this web service to measure equal loudness curves. Minimise any background noise: turn off machinery, close windows etc. If your computer has a fan, you may be able to put it under the desk. Plug headphones into your soundcard output and put them on, making sure that they seal well around your ears. In the 1 kHz column, choose a panel about halfway down. Listen to it and check that (i) it is not uncomfortably loud and (ii) it is considerably louder than the background noise. Go up or down the column if necessary until these conditions are satisfied.
What does your hearing curve mean? Most people will find that their hearing is most sensitive around 1–4 kHz and that it is less sensitive at high and low frequencies. How does your hearing response depend on loudness? The shape of your hearing response curve probably depends on loudness. Can you use this web service to measure hearing threshold curves? Calibration and improvements. Acoustics 101...Practical guidelines for acoustic construction: