Music Technology Coursework Example | Topics and Well Written Essays - 1000 words

Music Techno logy - Coursework Example+4dBu is generally found in professional level equipment such as public address systems. Finally, -85dBu indicates the level of noise floor (residual electronic noise) in the sound amplifying system. Noise floor is the measure of the lowest audible sound that can be amplified by the system. Collectively, the three levels are known as the operating line levels of an phone system (Glenn, 1998, p.731). A.2. What do the regorges of 24 dB, 89 dB and 109 dB indicate? Explain the control that each of these ranges has in an audio frequency system? (9 marks) The range 24dB in the plat indicates the headroom of the sound system (peak level- nominal level) = +28dBu-(+4dBu) =24dBu. According to Rossing (2002, p.168), the chief(prenominal) function of this range is to describe the capacity of the sound amplifying system to handle loud sound peaks. For example, a sound system with a larger headroom range is often able to handle significantly louder sound peaks before the sound is distorted or broken. On the other hand, 89 dB range shown in the diagram indicates the S/N dimension (Signal to Noise ratio) of the sound amplifying system. Generally, S/N ratio refers to the difference between the nominal level of the sound system and the noise floor. When the S/N ratio is combined with the headroom, the result is known as the dynamic range assuming that there is no token below the noise floor in the sound amplifying system (Borwick, 1980, p.45). ... gard, the dynamic range of the system function as the indicator of the difference between the electro-acoustic noise floor and the peak make level of the audio system. B. Why does the graphic refer to two different kinds of dB? Explain both types extensively development formulas for both types too. (15marks). The graphic diagram refers to the two types of dB namely the dB (SPL) and dBu scales. With regard to the dB (SPL), the main(a) variable measured is the sound pressure level in the audio system. This kind of dB is achieved by measuring the ratio amplified input signals using the logarithmic formula 10log(P2/P1)dB where the log is assumed to base 10. (Rossing , Moore , Wheeler, 2002, p.87). The other type of dB used in the diagram is dBu which generally indicates the output of the sound amplifying system (amplitude ratios). dBu is the unit measure of the absolute value of the electrical potential of the system in volts (relative to the sound produced). The formula for this kind of dB is 20 log10 (V/ V0) = 20 log10 (V/ 0.7746), where voltage is measured using substructure mean square (Glenn, 1998, p.851). C. About the values showed above, would you considered this to be a professional system or save a home-made-like system (e.g. cassette or vinyl) based)? Explain your choice. (5marks). According to the values given in the diagram, the system illustrated is close to likely to be a professional system. For example, headroom of 24dB is capable of ensuring high fidelity sound that is altogether found in the professional sound amplification systems which are often comparatively more school than the normal homemade systems like those using vinyl and cassettes. Additionally, the large dynamic range indicated in the diagram is a likely suggestion that the system has a high