By Stanley A. Gelfand
I'm a valid engineer (not paramedic) and that i stumbled on that ebook (its such a lot half) covers themes of my curiosity, huge and deep sufficient, yet i have to admit a few unwieldy sort on explaining issues there. (Just for the other instance (on related topic) i will be able to indicate to Juan G. Roederer's ebook "The Physics and Psychophysics of track. An Introduction", extra witty or effortless to understand.)
Read or Download Hearing: An Introduction to Psychological and Physiological Acoustics PDF
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Additional info for Hearing: An Introduction to Psychological and Physiological Acoustics
Note, however, that the combined waveforms shown in this figure are still periodic. In other words, even though these combined waveforms are no longer sinusoidal, they still retain the characteristic of repeating themselves at regular intervals over time. Moreover, notice that all three waves (f1+f2, f1+f3, and f1+f2+f3) repeat themselves with the same period as f1, which is the lowest component in each case. These are examples of complex periodic waves, so called because: (1) they are composed of more than one component, and (2) they repeat themselves at regular time intervals.
15a depicts a high-pass filter because the frequencies higher than a certain cutoff frequency are passed whereas those below that cutoff frequency are stopped or rejected. On the other hand, Fig. 15b shows a low-pass filter because the frequencies lower than its cutoff frequency are passed whereas higher ones are rejected. A cutoff frequency is usually defined as the frequency where the power falls to half of its Physical concepts 31 peak value. This location is called the half-power point. In decibels, the half-power point is 3 dB below that level of the peak, and is therefore also known as the 3-dB down point.
10b) in response to swallowing, yawning, sneezing, or shouting. Ossicular Chain Sound energy impinging upon the eardrum is conducted to the inner ear by way of the ossicles, which are the smallest bones in the body. There are three ossicles in each ear, the malleus, incus, and stapes; they are referred to collectively as the ossicular chain. Schematic illustrations of these bones are shown with the ossicular chain in place in Fig. 11. (Different and somewhat more life-like perspectives of the ossicles may also be seen in Fig.