Quiz #2 Flashcards
Timber and pitch are attributes that are
perceptual
Amplitude and frequency are
not perceptual
The Equal Loudness Principal
Illustrates that we hear pitches differently based on our ears, and how we perceive them. We are sensitive to pitch in the middle range, less at the low and high ends of the spectrum. The limits of our perception of pitch is limited then, to the range between 30 Hz to 5 kHz
The phenomenon of the missing fundamental
Illustrates that we perceive pitch based on a fundamental of the harmonic spectrum even if it is missing
Psychoacoustics
Stream segregation describes how our auditory systems separate sound that come from different sources
Ohm’s Law
Stating that the electric current is proportional to voltage and inversely to resistance I=V/R or V=IR
Faraday’s Law
Describes how an electric current produces a magnetic field and conversely, how changing a magnetic field generates an electric current in a conductor
The characteristic of a microphone most responsible for it’s “tone” or “timbre” is
It’s frequency response (spectra)
Condenser or capacitance microphones require what to operate?
Phantom power
The proximity effect demonstrates?
An increase in bass response in close proximity to a microphone
A microphone’s housing determines what?
It’s directivity/ polar pattern
The power rating of a loudspeaker is?
How much power it can produce over time without damage
A ‘driver’ is a device (and part of a speaker) that?
Produces sound. ex. woofers and tweeters
A loudspeaker works like?
A microphone, specifically like a dynamic or ribbon mics
The audible effect of ,mounting a speaker to a baffle is?
That low frequencies will propagate and not cancel
The inverse square law
States that sound intensity of a point source drops in intensity as we move away and that it decays with the square of the distance from the source
Driver size affects?
Directivity: Large drivers are more omnidirectional at lower frequencies and more directional at high freqquencies
A good PA will be?
Directional to the audience and also not direct sound to where it is not wanted
Properties of a standard stereo speaker set-up are that
It has two speakers and that it forms a triangle with equal sides at 60 degrees
Sensitivity
Expresses the sound pressure level a loudspeaker provides in relation to a standard reference
Directionality
Describes how sound radiates from the speaker
Dynamic range
Expresses the difference between maximum SPL and minimum SPL a speaker can reproduce
Frequency response
Describes which areas of the spectrum a loudspeaker emphasizes
