The A-weighting curve—in widespread use for noise measurement—is said to have been based on the 40-phon Fletcher–Munson curve. However, research in the 1960s demonstrated that determinations of equal-loudness made using pure tones are not directly relevant to our perception of noise. This is because the cochlea in our inner ear analyzes sounds in terms of spectral content, each "hair-cell" responding to a narrow band of frequencies known as a critical … WebSep 12, 2024 · Follow the 70-phon curve until it reaches 4000 Hz. At that point, it is below …
Equal-loudness contour - Wikipedia
WebFigure 2: Information from the curves of Equal Loudness. 2 . To find the phon value of an intensity measurement, find the db reading and frequency on the graph, then see which curve it lands on. Mainly, these curves show that it is difficult to hear low frequency of soft sounds, and that the ear is extra sensitive between 1 and 6 kilohertz. WebThe 0-phon curve represents the threshold of normal hearing. We can hear some sounds at intensity levels below 0 dB. For example, a 3-dB, 5000-Hz sound is audible, because it lies above the 0-phon curve. The loudness curves all have dips in them between about 2000 and 5000 Hz. These dips mean the ear is most sensitive to frequencies in that range. raytheon technologies companies
17.6 Hearing - College Physics 2e OpenStax
Webthe phon. the unit of loudness level All sounds that are equal in phons have the same loudness level even though their physical magnitudes may be different. ... Fletcher-Munson curves. Equal-loudness contours Sets found in the same folder. Module 1: Introduction to Psychoacoustics. 62 terms. erinlea315. Module 2: Signal Detection Theory ... WebPhons. Saying that two sounds have equal intensity is not the same thing as saying that … WebJul 16, 2024 · For completeness, the other two curves are ‘A’ weighting, which was originally based upon the 40-phon curve, but nowadays is mainly used in Sound Level Meters to predict potential hearing loss from environmental noise. Finally, the ‘C’ curve that was originally based upon the 100-phon curve and still finds some use in electro-acoustic ... raytheon technologies company size