## masking_filterbyamp.jpg

The image is a scientific graph titled "Masking patterns (masked audiograms) for a narrow band of noise centred at 410 Hz." The graph illustrates how the threshold of a sinusoidal signal increases as a function of its frequency, in response to a constant level of masking noise. Each curve on the graph represents different overall noise levels.

The x-axis is labeled "Frequency, Hz" and ranges from 200 Hz to 10,000 Hz (Hertz). The y-axis is labeled "Masking, dB" and ranges from 0 dB to 70 dB. There are five curves on the graph, each representing a different overall noise level: 30 dB, 40 dB, 50 dB, 60 dB, and 80 dB.

Each curve shows how the threshold of a sinusoidal signal increases as its frequency changes. For example, at 200 Hz, the threshold is lowest for all curves (around 10 dB), but it rises sharply to around 70 dB at approximately 500 Hz before gradually decreasing again towards higher frequencies.

The data used in this graph comes from Egan and Hake (1950) as cited by Moore in his book "Cochlear Hearing Loss" published in 2007. The curves are labeled with the corresponding noise levels: 30 dB, 40 dB, 50 dB, 60 dB, and 80 dB.

There is no depiction of people or characters in this image; it is purely a scientific graph.

This description was generated automatically from image files by a local LLM, and thus, may not be fully accurate. Please feel free to ask questions if you have further questions about the nature of the image or its meaning within the presentation.