Sound recording

Other sohd-state apphcations of sihcon carbide include its use as an electroluminescent diode for use in sound recording equipment and photomultipliers and controllers. It has been studied as a reflective surface for lasers. By combining its excellent thermal conductivity and high electrical resistance, sihcon carbide has also found apphcation as an insulating material for integrated circuit substrates. 

Discs Discs of nickel electroformed on to mandrels bearing grooves modulated with recorded sound have been used for many years for stamping sound recording discs. This process has been adapted and refined for the manufacture of digital records, including video discs . Video disc stampers must be hard, stress-free, and flat to within 0.1 m results of a short investigation directed towards these requirements have been reported ". 

Post-production Sound Editing In the context of sound recording, the ability to correct the pitch of an off-key musical note can help salvage a take that would otherwise be unusable. Multi-track hard-disk recording machines often offer such capabilities. 

Axon and Davies, 1949] Axon, P. E. and Davis, H. (1949). A study of frequency fluctuations in sound recording and reproducing systems. Proc. IEE, Part III, page 65. 

Horn, DeltonT. Creative Sound Recording on a Budget. New York McGraw-Hill Professional Book Group, 1987. 

The National Archives has facilities for making photostats, microfilm, photographic and Ozalid prints, and copies of motion picture and sound recordings it is empowered by law to provide authenticated or unauthenticated copies of records in its custody not exempt from public examination nor protected by copyright. It may provide copies of records protected by copyright if authorized by copyright owner. 

Use Laminates, support for photographic film, document preservation, pressure-sensitive tape, magnetic sound-recording tape, window cartons, envelopes packaging. 

Most presentations are more dynamic if they include diagrams, photographs, videos, or sound recordings, like the one shown in Figure 19. A multimedia presentation involves using stereos, overhead projectors, televisions, computers, and more. 

A different approach has been applied for the classification of flame images that provides information on the probability of coincidence with each of the combustion states previously known. This procedure is inspired on the cepstral analysis techniques, commonly used for speech recognition [37]. Although sound records are of a type different from image data, both can be equally transformed into covariance matrices, as required in this kind of method. 

We could imagine that this is a signal picked up by a microphone, i.e. that it is a sound recording. What we would hear when we would play back this recording is a series of short beeps of the same pitch. The signal consists of one tone, one sine, interrupted by pauses. However, the building blocks of the Fourier transform continue in the silences. They are not well suited to represent the intermittent nature of this signal. 

Have you ever wondered what your CDs and DVDs are made of The inside is made of plastic, about 1 mm thick. A machine embeds digital information, such as sound recordings, into the plastic as a series of bumps and then coats the plastic with aluminum. That is what makes CDs and DVDs so shiny. A thin layer of acrylic protects the aluminum. The shiny surface allows the laser from the CD or DVD player to read the information reflected off the disc s surface. 

Cochlear implants can be divided into two components the external speech processor and the implanted electrode array and electronics. A diagram of a cochlear implant is shown in Figure 40.1. Sounds recorded by the microphone are sent to the speech processor, which decomposes the incoming waveform and extracts certain cues that allow the speech signal to be represented as a pulse sequence. The information about the pulse sequence is then transmitted transcutaneously to the implanted electronics through a radio-frequency link, where it is decoded and used to specify stimuli that are delivered via the implanted electrode array. 

The LT films are usually stretched with the aim of improving the mechanical properties in the machine direction. This is necessary for products like sound-recording tapes and adhesive tapes. The thickness and mechanical properties must be within very narrow tolerances and, in addition, the strength in the transverse direction must be high enough to prevent splitting. This can be achieved by various methods which will now be discussed. 

The amplitude of the first heart sound SI (S2 in case of diastolic murmur identification) which is liable to the indicators of pathology (objective criteria) is not constant for every heart sound recording. This can lead to wrong classification. 

The AKBNN method operates on some periods of the cardiac cycle to analyze a given individual heart sound recording, which makes it able to detect murmurs of both classes (systolic and diastolic) and all possible types. The obtained results in the context of the common limited database (only congenital murmurs captured from children) indicated that AKBNN produced the best performance as an automated murmurs classifier with an optimum sensitivity and specificity of 92.9 and 92 % respectively, with respect to the two evaluated previous methods. But its Hardware... 

How many different murmurs types are there, that must be represented in training DATA-set for a network to have a sensitivity and specificity of 100% for all possible heart sound recordings ... 

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