Exam 1 Flashcards
Microphone level
0.001V
Line level
1V
Speaker level
10V
Amplitude
amount of displacement of the medium at any moment within each cycle of the waveform
Period
The time it takes for two successive wave crests to pass a given point.
Wavelength
The physical length of one cycle of a wave
Frequency
the number of complete cycles a vibration or waveform makes in a second
Phase
A measurement (expressed in degrees) of the time difference between two similar waveforms.
Polarity
The direction of current flow or magnetizing force.
Complex waves
a waveform consisting of a fundamental frequency and superimposed harmonics
Noise floor
amplitude of device with no signal present
Dynamic range
amplitude of nose floor to threshold of distortion
Signal to noise ratio
The comparison of the strength of a signal level to the amount of noise emitted by the device, expressed in dB.
Pressure transducers
A microphone where the diaphragm moves because of the pressure of the sound wave having one side of the diaphragm working against the normal or controlled air pressure inside the microphone case. carbon granule, piezoelectric, condenser, dynamic (moving coil)
Velocity transducers
A microphone whose diaphragm is exposed front and back and diaphragm movement is caused by the pressure difference between its front and back. ribbon
Dynamic (moving coil)
A microphone in which sound pressure waves are converted to an electrical audio signal by an induction coil moving within a magnetic field
Dynamic (ribbon)
A microphone that converts sound waves to electrical current via a thin conductive ribbon set between magnetic poles.
Condenser
A microphone in which sound is converted into electrical current through changes in a capacitor. The sound pressure waves move the diaphragm, producing changes in capacitance which are then changed into electrical voltage.
Phantom power
A system used to supply DC voltage to condenser mics and other components through the audio cables, eliminating the need for external power supplies.
Polar pattern
a graphic display of the area around the microphone that is sensitive to sound waves, detailing the audio output levels in dB of sound arriving from different directions
Multitracking
is process of recording a collective of sound sources onto separate tracks, each with its own audio channel, then combining the tracks to play back simultaneously.
Overdubbing
The process of recording an additional musical performance over an existing recording
Sensitivity
the amount of output that a microphone can produce from a standard level of sound, as compared to the output of another microphone from the same sound level.
Mixdown
The processes of creating a final mix by combining multiple audio tracks into a single track
