Sound Midterm

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sin-wave: the most basic wave form with microphones and speakers
hertz: how often we go from hi to low in one second
amplitude: the difference between high and low to decibals
decibals: amount of energy it takes to achieve the amplitude in a given space
frequency response and decibal sensitivity: vital for mics. helps how far mics are from subject
reverberation: how to describe an acoustic space
how can you check the reverberation in a room?: Clapping
What does RAT stand for?: Reflection, Absorption, Transmission
What does reflection mean?: when sound hits a hard surface and bounces
transmission: when sound hits a hard surface and goes through it
what surface is a good transmitter?: glass
what kind of place is anti reflective?: anechoic chamber
dirty power is: any electronic device in wall with bad wiring
how does a dynamic microphone work?: Has a moving coil that a magnet moves past and a diaphragm that the sound moves. does not need a power supply.
how does a condensor microphone work?: it has two metal plates moving back and forth. needs power to work.
which pick up pattern does an SM-58 use?: cartioid
which pick up pattern do canons have?: bidirectional
what is required in a balanced signal?: A hot and cold signal. basically a hot signal (original signal) going in and the opposite signal (180 degrees) coming back. Also needs a ground
what happens when you put a balanced cable into an unbalanced cable?: nothing
what happens when you put an unbalanced cable into a balanced cable?: it acts like an antennae and collects electro magnetic signals which creates a hummm.
The pins in an XLR camera. 1 2 3: 1: ground 2. hot 3. cold
is an XLR connector always balanced?: no
To tell if a connector is balanced it must have...: tip/ring/sleeve. 3 rings around the metal jack.
which is the most awful connector?: RCA, standard AV or S video...
what is a cardioid mic good for?: Reporter on the street so that the street noise behind the reporter isn't heard.
when to use omnidirectional mics?: When the distance between the mic and the speaker are small. Talking heads.
When do you use a hyper or super cardioid mic?: `When you want to discriminate the most against reverberation on the other side of the mix
when do you want to use short shotguns?: When you want directional sound that descriminates against reverberation and noise at high frequencies
When to use long shotguns: when you want a larger frequency range
what does dynamic range depend on?: how big a waveform it is even if it has the same amount of crests/troughs as a smaller form
what is clipping: when one loses the tops and bottoms of soundwaves and distorts
Mic waveform is at what decibal level: -10
line waveform is at what decibal level?: -4
if you put a Mic into a line input what will happen?: it will be quiet
if you put a line into a mic input, what will happen?: you will get clipping
An A Waiting dynamic range favors what range?: 2K-4K
C Waiting dynamic range favors what range?: de-emphasizes low frequencies
what does ENG stand for?: Electronic News Gathering
what is a signal to noise ratio?: Quality of signal to pass through audio circuit without noise. The higher the ratio the better.
The A and B in a chain/circuit is what?: A : record (in) B : monitor/output (out)
what is a dual system?: when audio is recorded separate from picture
how could you eliminate any infrasonic interference from camera?: Get a compressor mic with a low freq switch.
what is acoustic mapping?: generates a chart to tell you how to equalize the room.
how many kilohertz is bartone?: 1Kh
Old remotes worked how?: By using audio waves instead of radio waves.
white noise is...: random noise.
pink noise is: calibrated and has less high frequencies.used to test equalization.
How and when do you set equalization?: Do not set on...set. But if you blast pink noise into a room and let it reverberate it sees how it works together. Try to reach a flat plane.
what is a node?: When audio waves collide they get soft where they collide and are loud outside of the collision.
Which is better .wav of .mp3: .wav
.wav is how many channels?: 1
Samping frequency is: how many times it "asks" a wav where it is in the spectrum.
bit depth: is how to measure the sampling frequency. the higher the number, the better the quality and bigger the file size will be.
In a wireless system, the group number is what?: The course adjustment and special transmission frequency
in a wireless system what is the channel #?: fine adjustment

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Created By tehbuffy