Brainarium

They are used for speech applications, such as meetings. - Which of the following statements about automatic mixers in audio applications is true? They are used for speech applications, such as meetings. They only work for program audio applications, such as music. They can only adjust one channel at a time. They require live personnel for operation. the number of times a complete cycle occurs per second - What is the definition of "frequency?" the cycle when molecules move from rest th...

When documenting requirements for network services, a formal technical document called a(n) _______ is often utilized. - SLA( service level agreement) "When considering a site for a projected image, the AV professional must plan for which of the following concerning audience sightline considerations?" - " Distance to the furthest viewers from the screen and position in relation to the screen" "A client has decided to replace an existing wall-mounted 42-inch plasma screen in their board...

The loudspeakers in a distributed system are located ____. at regularly spaced intervals throughout the listening area on portable stands to the left and right of the presentation area in a vertical array hung in a slight curve in a central cluster directly above the presentation area - at regularly spaced intervals throughout the listening area Lower sensitivity microphones may be used in order to _____. reduce the energy consumption of an audio system save money in applications where a...

- You've been dispatched to address an installation in which a ceiling mounted projector is overheating. What is the FIRST step you might take in troubleshooting this issue? Verify that the brightness is set within parameters as established by the commissioning documentation Check the air filters to ensure they're free of all dust and clean if necessary Turn the project upside down and install with a reverse mirror mount to allow better airflow Verify that the correct Wattage of lamp was i...

Hierarchy of Design Consultation - 1. Regulatory Requirements 2. Project Documentation 3. Client's Standards and Best Practices 4. National and International Standards 5. Manufacturer Documentation 6. Other 'Best Practices' Documentation Allied Trade - is a business that collaborates with AV professionals to complete a project. Architects engagement with AV Pro - Window placement in display environments; space requirements Interior Designer engagement with AV Pro - Furniture; equipme...

160 degrees - The visual field of the human eye is _____ wide. 160 degrees 135 degrees 90 degrees 200 degrees AV equipment allows for adjusting the "whiteness" for optimal display. - Why is color temperature awareness important in the AV industry? The AV industry strives to set the standard for "whiteness." AV equipment allows for adjusting the "whiteness" for optimal display. People expect exact "whiteness" when viewing a display. "Whiteness" is subjective with ever changing...

Logarithm - is the exponent of base 10 that equals the value of a number In decibel formulas how should values be logically arranged when comparing two numbers (V1 / V2) - If you expect a gain, place the higher number first. If you expect a loss, place the smaller number first. Explain negative decibel values - measurement just means "less than before," or in this case, "less than the reference level. It does not mean the basic unit it represents has a negative value Decibel - describes...

Full overlap distributed ceiling system arrangement - Will provide excellent coverage at most frequencies (1.4 dB variation). However, this is a costly approach, and will likely provide more coverage than required. This amount of overlap may also result in some negative interaction with the sound from nearby loudspeakers, such as phase cancellation. This is because a dense overlap pattern may project too much acoustical energy within the space. Distributed Loudspeaker System - Employs multi...

Electret Microphone - A type of condenser microphone. It has prepolarized material which is applied to the microphone's diaphragm or backplate. This provides a permanent, fixed charge for one side of the capacitor configuration. This permanent charge eliminates the need for the higher voltage required for powering the typical condenser microphone, so it can be powered using small batteries and normal phantom power. Lavalier Microphone (lav /lapel) - It is a small microphone designed to be ...

Building code sources - 1. NFPA - national fire protection association 2. NEC - National Electric Code 3. ICC - International Code Council 4. ADA requirements Signal Separation in Racks - Group equipment together according to their function to protects against crosstalk among cables through EMI Chemical Systems - Replace the room air with fire inhibiting gas, such as halon, CO2, or halocarbon agents (that contain chlorine, fluorine, or iodine either individually or in some combination). ...

Transmission is defined as sound energy that is _____. reflected through a partition not reflected or absorbed absorbed and reflected remaining in the space - not reflected or absorbed Given the same reference sound input level into two different microphones, the more sensitive microphone would provide _____. A higher electrical output Higher converted acoustical energy A lower electrical output Lower converted acoustical energy - A higher electrical output Harmonics are _____. the p...

EAD, Equivalent Acoustic Distance - Is the farthest distance one can go from the source without the need for sound amplification or reinforcement to maintain good speech intelligibility. It is a design parameter dependent on the level of the presenter and the noise level in the room PAG - Potential Acoustic Gain is the potential gain that can be delivered by the sound system without ringing and before feedback occurs. It is based upon the number of open microphones, and the distances betwee...

project managers are responsible for __________ - assessing the budget, timeline, and required resources for each project The main role of manufactureres in the AV industry is __________. - creating and producing AV products The relationship between a manufacturer and a distributor is defined by __________. - the contract between them Distributors can reduce costs for manufacturers by __________ - warehousing, selling and shipping their products independent sales representatives are paid...

twice - In order to capture an analog signal accurately, the sampling rate must be at least _____ the frequency. multiple sound sources will reach listeners at the same time - Audio signals may be purposely delayed in sound reinforcement applications to ensure that _____. ultraviolet - What type of wave has the highest frequency in the range of the electromagnetic spectrum? decreased - If voltage stayed the same and current increased, resistance would have _____. LCD - What is an example ...

What is the BEST way to determine how reverberant a space is? - Clap your hands and listen for an echo - Ask the client if anyone has complained that the room is too noisy - Use an RT60 meter - Use a DB SPL meter - Use an RT60 meter - feedback from the benchmarking site visit - end-user descriptions of how the room will be utilized When establishing initial contact with a client, try to develop a relationship early on with the: - Chief operating officer - Information technology manager ...

On Friday afternoons. - As part of regular system maintenance, when is the BEST time to update device firmware? -On Friday afternoons. -As soon as updates are available. -Device firmware should never be updated after system sign-off. -After coordination with the client, and when the system will be available for an extended period of time Design phase - When working with a client to design an AV solution for a new conference center, the client requests a detailed budget for the equipment a...

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The main advantage of a curvilinear transducer over a vector transducer is: A. the ability to perform CW Doppler with 2D imaging B. the smaller footprint C. the wider near field D. the ability to scan at increased frame rates - the wider near field Which of the following describes the primary advantage of a 1.5D array over a 1D array? A. the 1.5D array eliminates the need for a stand-off pad for superficial imaging B. the 1.5D array can produce a trapezoid field of view while the 1D array...

give the correct order of receiver operations - 1. amplification 2. compensation 3. compression 4. demodulation 5. reject (low or high) frequency and (low or high) amplitude, will cause an increase in the mechanical index and the risk for cavitation - low frequency, high amplitude give the correct units for each: circumference: area: volume: - circumference: cm area: cm squared (cm^2) volume: cm cubed (cm^3) when PRP increases, frame rate .... - increases period X number of cycles ...

Velocities are usually higher at the proximal anastomosis site of a _____ ______ ______ because the diameter of the graft increases distally - reversed in situ graft Why is there no aliasing on CW doppler - CW uses two elements to send and receive sound waves, PW only uses one What is true regarding compression techniques on a pseudo with a larger stalk - thrombin injection is more effective on pseudos with larger stalks than compressions compressions must be done in 10 1 minute intervals ...