## What do equal loudness curves show?

Equal loudness curves indicate that our perception of frequencies changes based on playback volume, at least for pure-tones. Doing so will help to ensure that your judgement is not thrown off by the effects that playback level can have on your perception of different frequencies.

What does the Fletcher Munson curve equal loudness contour indicate?

The Fletcher-Munson loudness curves indicate the ear’s sensitivity to different frequencies at various levels. Fletcher Munson Curves are sometimes referred to as the Equal Loudness Contours, although these are two slightly different standards (see figure 1).

What are equal loudness curves quizlet?

Terms in this set (28) equal loudness contour. a curve showing the amplitude of tones at different frequencies that sound about equally loud. measure of sound pressure.

### What do the Fletcher Munson curves measure?

The Fletcherâ€“Munson curve, for example, shows the relationship between loudness in decibels and subjectively judged loudness.

Are all frequencies equally loud?

As you know, we are not equally sensitive to sounds of all frequencies so perceived loudness of a tone in fact depends on frequency as well as intensity. Two sounds can have the same physical sound pressure levels but if they are of different frequencies, they are often perceived as having different loudness.

What is the practical implication of equal loudness contour?

The concept of equal loudness contours is applied to hearing conservation measures. The ear is more sensitive to high frequency sound waves than it is to lower frequency sound waves, thus the actual effect on the human ear in terms of pressure exerted by sounds is taken into account.

## What is the equal loudness curve What are other names for it what does it state and why is it important to us?

Often referred to as equal-loudness contours, the Fletcher Munson Curve is related to physics and the way that the human ear responds to different frequencies. The Fletcher Munson Curve denotes the relationship between sound pressure level and frequency.

How do equal loudness contours relate to loudness perception?

An equal-loudness contour is a measure of sound pressure level, over the frequency spectrum, for which a listener perceives a constant loudness when presented with pure steady tones. These are intended to offset the apparent loudness fall-off at those frequencies, especially at lower volume levels.

Why is equal-loudness contour important?

Equal-loudness contours describe the apparent loudness of a sound in relation to its frequency for human listeners. This scale is important because human loudness perception is extremely sensitive to differences in frequency.

### How do equal-loudness contours relate to loudness perception?

How does an equal loudness curve change as you age?

Equal-loudness-level contours (ELLCs) indicate com- binations of the frequency and sound pressure level of pure tones that are perceived as equally loud to listeners under specified listening conditions. People become less sensitive to sounds with age.

What is the Equal-loudness contour?

A pair of sine waves with different frequencies, by definition, have an equal level of phons if both are perceived at the same level by the average listener, assuming that the person is not hearing impaired. Another name often given to the equal-loudness contour is the Fletcher-Munson Curve.

## What does the loudness curve tell you?

The following chart shows two sets of equal loudness curves: For each frequency along a single contour line, the y-axis tells you how loud, in dB SPL, that frequency would need to be in order for it to sound as loud as the other frequencies along the contour.

What are fletcer Munson curves (equal loudness contours)?

What are Fletcer Munson Curves (Equal Loudness Contours)? The Fletcher Munson Curves are a bunch of curves which show how sounds of different frequencies and at different sound pressure levels have to be boosted/subdued in order for the human ear to perceive an equal loudness level across all frequencies.

When was the loudness curve of the human ear standardized?

The above curves follow the equal-loudness curves resulting from the measurements of Robinson and Dadson in the mid 1950s and are adapted from the depiction of the curves in Donald Hall’s book “Musical Acoustics”. Subsequent measurements of the human ear’s loudness response were standardized under the designation ISO 226 Standard.