loudness contour in a sentence

Examples

1. He also developed the concepts of equal-loudness contours ( commonly known as Fletcher Munson curves ), loudness scaling and summation, and the critical band.
2. Equal-loudness contours indicate the sound pressure level ( dB SPL ), over the range of audible frequencies, that are perceived as being of equal loudness.
3. It is now better to use the generic term " equal-loudness contours ", especially as a recent survey by ISO redefined the curves in a new standard.
4. Not only do equal-loudness contours vary with intensity, but perceived loudness of a complex sound depends on whether its spectral components are closely or widely spaced in frequency.
5. Equal-loudness contours are often referred to as " Fletcher-Munson " curves, after the earliest researchers, but those studies have been superseded and incorporated into newer standards.
6. Equal-loudness contours were first measured by Fletcher and Munson at Bell Labs in 1933 using pure tones reproduced via headphones, and the data they collected are called Fletcher Munson curves.
7. Humans do not perceive low-and high-frequency sounds as well as they perceive sounds between 3, 000 and 4, 000 Hz, as shown in the equal-loudness contour.
8. Note also that our sensitivity to different frequencies follows general loudness contours and higher frequencies tend to " roll off " .  The preceding contribs ) 21 : 57, 14 January 2007 ( UTC ).
9. The human ear is less sensitive to low frequencies, as indicated by Equal-loudness contours, so a well-designed system should be capable of generating relatively higher sound levels below 100 Hz before clipping.
10. The sound level meter is useless for properly assessing noise levels, since the commonly used A-weighting is based on equal-loudness contours for pure tones, and is not valid for the random noise.