Sound Reinforcement Final questions and answers 100% guaranteed success.

Sound Reinforcement Final questions and answers 100% guaranteed success. What is sound reinforcement? - correct answers.Process of manipulating & amplifying sound over an area that the source, by itself, would not be capable of covering adequately. Primary requirements of a sound reinforcement system - correct answers.Intelligibility, Fidelity, Power, and Monitoring and Controllability Secondary requirements of a sound reinforcement system - correct answers.Portability, longevity, and flexibility Basic sound system model - correct answers.Input transducers - signal processors - output transducers What is natural sound? - correct answers.Unprocessed sound What is a Transducer? - correct answers.Device that captures the sound and gets it into a form that the system can process. What is a Transformer? - correct answers.A ___ is a static electrical device that transfers electrical energy between two or more circuits. Fixed Installation - correct answers.For venues with regular sound needs Portable P.A. - correct answers.Can be taken from one location to another Personal P.A. - correct answers.Smallest; can usually fit into a car Range of 10-20 ft. Band P.A. - correct answers.Designed to reinforce small to large venues Easily scalable Best for groups of 10-2,000 people Tour/Stadium P.A. - correct answers.Extreme end of PA systems Requires small army of people & trucks Use same components - just more & bigger versions Needs more set up time & knowledge What are three common types of distortions? - correct answers.1. Overdriven sound 2. Harmonic Distortions 3. Intermodulation What constitutes "the sound environment"? - correct answers.The collection of objects, conditions, and circumstances in which the sound system operates and with which it interacts. What are the three major conditions that the environment can affect? - correct answers.1. Affects how we, as engineers, hear 2. Affects the perceived performance of the system 3. Affects how the audience hears Sound waves are by nature ___ waves. - correct tudinal We use 2D graphical representation of sound waves known as ___ waves. - correct answers.Transverse What is Reflection? - correct answers.Interactions with solid surfaces and objects in the environment What is Diffusion? - correct answers.Reflections from a rough or irregular surface. Reflective energy is propagated in many directions. What is Reverberation? - correct answers.Sounds reflected from various surfaces Early Reflections - correct answers.<80ms Persistent Reflections - correct answers.≥100ms RT60 - correct answers.The amount of time it takes the reverberation of a room to decay 60dB below the initial SPL of the direct sound. What is Absorption? - correct answers.___ occurs because the energy carried by the wave, which was previously used to displace air molecules, is now being used to displace the molecules of that object. It takes more energy to displace the molecules of the object than of air. What is the Absorption Coefficient? - correct answers.Ranges from 0-1, with a "1" being 100% absorptive. A material has an absorption coefficient of 0.15 at 500Hz. What does that mean? - correct answers.The material absorbs 15% of the sound at 500Hz. What is Diffraction? - correct answers.The change in direction of travel of a wave due to interaction with an object. What does it mean to "toe in" a set of speakers, and why is this considered "best practice" in sound reinforcement? - correct answers.It is how the speakers are angled towards the main listening position. If the speakers are angled inward >< then that means they are "toe in". That way the sound is directed towards the listener. What is inside a Microphone? - correct answers.Transducer What is inside a DI Box? - correct answers.Transformer What are the two main types of transducers in a sound reinforcement system? - correct answers.Dynamic and Condenser What does a balanced connection mean? - correct answers.A ___ has three conductors in the connector and three wires in the cable: two signals wires plus a separate ground wire. ___ use two signal wires; both carry a copy of the signal, but the two copies are sent with their polarity reversed. If you sum two signals that are identical but are reversed in polarity, the signals cancel out, leaving you with silence. What is a unbalanced connection? - correct answers.An ___ consists of two connectors with two conductors each, connected by two wires inside the cable—a signal wire and a ground wire. Typical line level signal in professional audio is ___ dBu. - correct answers.+4 Typical microphone level signal is between ___ dBV and ___ dBV. - correct answers.-60 and -40 What is the pinout for an unbalanced 1/4" connector? - correct answers.Tip-Ring What is the pinout for a balanced 1/4" connector? - correct answers.Tip: Left positive Ring: Right positive Sleeve: Cable shield What is the pinout for an XLR connector? - correct answers.Pin 1: Ground Pin 2: Positive Pin 3: Negative What is the pinout for an RCA jack? - correct answers.Ring: (Right Channel) Sleeve: (Ground) Tip: (Left Channel) Sleeve: (Ground) What does a DI Box do? - correct answers.A ___ converts an unbalanced line or speaker level signal to a balanced microphone level signal. It also provides impedance matching functions.