Using the Fletcher-Munson curves of equal loudness, rank the following tones by

Question

Using the Fletcher-Munson curves of equal loudness, rank the following tones by decreasing loudness (1=loudest). Remember that the horizontal axis is marked as a logarithmic scale. The divisions between the far left and 100 represent 20, 30, 40, 50, 60, 70 ,80 and 90. The divisions between 100 and 1000 represent 200, 300, 400, 500, 600, 700, 800, and 900.

1. A 70dB tone at a frequency of 1000Hz

2. An 80dB tone at a frequency of 20Hz

3. A 70dB tone at a frequency of 10,000Hz

4. A 70dB tone at a frequency of 3,000Hz

Explanation / Answer

1, its right about at 73

2, its about 87

3, its about 71

4, its about 76

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