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.: Frequncy Sensitivity with Various Tones :.
Overview
Although sounds with a greater sound pressure level usually sound louder, this is not always the case. The sensitivity of the ear varies with the frequency of the sound. Fletcher and Munson (1933) determined curves of equal loudness for pure tones (tones of a single frequency). These cureves, or similar curves, are replete in acoustics literature.The curves display the relative insensitivity of the ear to low intensity levels. Hearing sensitivity reaches a maximum around 4000Hz, which is near the first resonance frequency of the outer ear canal, and again peaks around 13KHz, the frequency of the frequency of the second resonance. In this demonstration we compare the thresholds of audibility...
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.: The Interface :.
Overview
The interface is shown as a screenshot on a separate page. Jump to that page HERE.
The user works from left to right, assuming control over various parameters that are related to this study.
[1.] Beginning with the master volume and audio on/of in the "start here" section (colored lightest blue) the user starts the system
[2.] The user then moves onto the "operation section" beginning the tone playback and subsequently, the masking noise playback as well.
[3.] Next, the user moves onto the "exploration section". Here they are able to tweak the most crucial parameters to the masking illusion.
[4.] On the farthest right, in the "data section" the user is able to enter in their name and choose to save their specific parameter selections to a separate data collection window. This window is shown as a screenshot below the Interface Screenshot.
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.: Interface Download :.
Download Frequency Response Interface
More Interfaces
Besides expanding upon a creative way to learn or teach psychoacoustics, interfaces such as these are the type of work that can lead you as a sound synthesist and csounder to begin to integrate your work into the cognitive and eventually clinical sciences. As an example, check out an interface designed by a like minded synthesist that automates many of the research techniques used by music therapy and music psychology researchers. LINK HERE
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