Sound Reinforcement Final questions and answers latest top score.

Sound Reinforcement Final questions and answers latest top score. Primary Requirements for Sound System - correct answers.1.) Fidelity 2.) Intelligibility 3.) Power 4.) Monitoring/controllability Permanent PA - correct answers.-easily hidden in structure of venue -minimal setup for each show -system is inflexible -expensive to install Portable PA - correct answers.-flexible -requires different set-up -less expensive than installed -more obvious visually basic flow - correct answers.Mic, Console/Mixer, effects processor, power amplifier, speaker Inverse Square Law - correct answers.For every doubling of distance from the point source, sound intensity decreases by 6 decibals. In general when frequency _____, wave length _________. - correct answers.Goes up, decreases Front of House (FOH) - correct used to refer to the equipment or resources whose primary function is to provide audio coverage to the main audience area A line array is more commonly used in which PA system - correct answers.Touring PA pink noise - correct answers.What type of noise signal, that is equal energy per octave, is most commonly used to assess speaker performance? A good way to quickly assess the early reflective properties of a room is to excite the acoustics of the room by whistling. - correct answers.False, you should clap instead A sound system is more likely to have reflection issues when... - correct room has a lot of hard surfaces like stone or wood What is one of the easiest ways to reduce the effects of early reflections from side walls when placing loudspeakers in a room? - correct answers."toe in" in our tilt the speakers inward Diffusion - correct the energy of a sound is propagated in many directions by an irregularly shaped object. Diffraction - correct change of direction of travel of sound waves caused by the interaction with an object. reflection - correct striking of a sound against a large flat object that propagates the energy at an angle equal to the angle of incidence. A room that has too much absorption will sound dead, and a room with too little absorption can make it difficult to hear. - correct When referring to reverberation, early reflections are sounds that arrive within the first 80ms of the direct sound and add to the perceived loudness of the sound. - correct What effect does the audience have on the perception of sound in a space? - correct answers.-people absorb high frequency energy -type of clothing people are wearing will determine how much sound is absorbed -sound in the room can change based on whether the audience sits or stands Power Alley - correct line between two speakers where they are in phase and therefor noticeably louder in that space Energy absorbed by acoustic panels is released as - correct it is easier to absorb low frequencies than higher frequencies - correct , it's easier to absorb higher frequencies because their shorter wavelength is less powerful Phase - correct not only a description of where two waveforms are in their cycles but also where they are in time with each other. Phantom Power is 48 volts of power supplied through the microphone cable on pins... - correct answers.2 & 3 proximity effect - correct answers.An increase in the low frequency response of a microphone as a user moves very close to the diaphragm is the definition of.. frequency range - correct highest and lowest frequencies a microphone responds to frequency response graph - correct how sensitive the mic is at different frequencies. In general, a low impedance microphone is less than... - correct answers.600 ohms The sensitivity of a microphone directly relates to its... - correct of the diaphragm Monitor World - correct answers.The location from which the speakers located on the stage for the musicians is mixed. A stage plot shows the location of the Main PA's Left and Right speakers. - correct answers.False When phantom power is turned on at the mixer, +48v is supplied to pin(s) ___ of the XLR plug of a microphone. - correct answers.Pins 2 & 3 Impedance - correct opposition that an electronic device gives to alternating current. What are the most common types of microphones in live sound reinforcement? - correct answers.Dynamic and Condenser What mic(s) best rejects sound from the back? - correct od What Mic(s) are subject to proximity effect? - correct oid, super cardioid, bi-directional What Mic(s) will equally respond to sound from all directions? - correct -directional What mic(s) take advantage of a "port" to create their polar pattern? - correct oid, super cardioid If a musician covers the ports during a performance, what will happen? - correct answers.Mic will be much more likely to feedback The best way to prevent plosives in a microphone is to... - correct answers.-remove frequencies below 80 hz with a high pass filter -move the mic back by at least 8 cm -use omni-directional mic to reduce proximity effect When choosing a microphone for any application, you should consider - correct answers.- the SPL of the Source -distance from the source -coverage area -need for isolation -feedback control -tone and cost Sense vocal ensembles are spread out over a larger area it is typically best to use two _____ microphones because of their sensitivity. - correct answers.Condenser The sensitivity rating of a microphone is related to the... - correct of the diaphragm Why is a condenser microphone so much more sensitive than a dynamic microphone - correct answers.A condenser mic's diaphragm has very low mass, therefore it can move much faster than a dynamic mic's diaphragm which has much greater mass When miking a sound source near a reflective surface, such as miking a person at a podium, the sound can reflect off of the surface an create phase interference known as comb filtering. An approach to solve this problem is - correct answers.-move mic as close as possible to the sound source -replace the mic with a boundary mic ORTF technique (Office de Radiodiffusion Télévision Française) - correct o near coincident technique using two cardioid microphones placed at a 110 degree angle. Which microphone type requires a small built-in amplifier to amplify the voltage fluctuations from a sound source before it is sent to the mixer? - correct answers.Condenser Diversity - correct to prevent dropouts caused by radio cancelations at the antennas when using wireless microphones. it is best practice to separate the antenna by a minimum of - correct answers.1/2 wavelength. Which of the following are connections and/or switches found on a DI box? - correct answers.-parallel output -balanced XLR output -Pad Switch -Ground Lift An Unbalanced cable - correct three conductors a balanced cable uses - correct conductors Common Mode Rejection - correct answers.Splitting a signal into two copies and inverting one copy while being transmitted through a cable in an effort to prevent signal interference describes EMI and RFI - correct of interference that affect the quality of data transmission Shield - correct answers.When an audio signal induces current into a cable lying next to it. Which type of cable shielding is used for permanent installations? - correct answers.Foil Speaker wire has - correct conductors but no shielding is needed. What happens when you substitute a smaller cable (signal cable) for use on a speaker? - correct answers.-increase the impedance of the cable -your sound will lose all tone/definition in the low frequencies The Terms NL2, NL4, NL8 refer to... - correct number of conductors you have inside a speakon connector and cable Pin one on an XLR is.. - correct d/ground