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Engineering
n/a
95
Audiology
Undergraduate 1
11/08/2012

Additional Audiology Flashcards

 


 

Cards

Term
dBV Reference
Definition
1 volt rms
Term
dBu Reference
Definition
.775 volts
Term
dBW Reference
Definition
1 Watt
Term
dBv
Definition
Not used anymore from confusion with dBV
Term
Z=
Definition
Impedance
Term
What is Impedance?
Definition
The total opposition to AC by an electric circuit. Includes Resistance and reactance of the circuit and is expressed in Ohms. 
Term

Each Element is composed of Atoms.

What are the 3 parts?

Definition
Protons, Neutrons, Electrons
Term
Protons charge is what and where is it located in the atom?
Definition
Positive. part of the Nucleus.
Term
Neutrons charge is what and where is it located in the Atom?
Definition
Neutral, part of the nucleus
Term
What charge does an Electrons have and where is it located in the Atom?
Definition
Negative, surrounds the nucleus
Term
Atomic Number
Definition
The number of protons in the nucleus giving it's identity
Term
The further away the nucleus is, the ______ energy it has
Definition
more
Term
Electricy is almost always the result of what occurance?
Definition
Electrons moving from one atom to another
Term
Electrons are lighter or heavier compared to Neutrons and Protons?
Definition
Lighter. They weigh almost nothing.
Term
Atomic Weight 
Definition
aprrox. equal to the sum of the number of Protons and Neutrons in the nucleus
Term
A _____ is when an Atom has an electrical charge based off the loss or gain of an electron
Definition
Ion
Term
Shortage of electrons=
Definition
Positive Charge
Term
Shortage of Protons=
Definition
Negative Charge
Term
Different elements join together to make up
Definition
Compounds (i.e. h2o) 
Term
The hotter the element
Definition
The faster atoms are moving
Term
Electrons are mobile in a...
Definition
Conducer
Term
___________ is the best conductor, but we use ___________
Definition
Silver; Copper & Aluminum
Term
Insulator ______ current from flowing
Definition
prevent (impedes)
Term
Glass, dry wood, plastics, & most gases are examples of 
Definition
Insulators
Term
Semi-conductors require _____ current
Definition
Direct (DC)
Term
Silicone, Selenium, Germanium & other metal oxides are examples of
Definition
Semi-conductors
Term
Semi-conductors are used to control conductivity to 
Definition
produce, amplify, rectify, switch and mix a signal
Term
Current is the
Definition
Movement of electrons in a substance
Term
1 Coulomb per second= 
Definition
1 Ampere
Term
I is the math for 
Definition
Ampere (Current)
Term
EMF is 
Definition
Electronic Motive Force
Term
EMF is expressed in 
Definition
Voltage (Volts, or V)
Term
E is the math for
Definition
Voltage 
Term
EMF is also known as 
Definition
potential (difference) because it exists even when there is no current present
Term
The measure of the opposition that a circuit offers to the flow of an electric current is known as
Definition
Resistance
Term
Resistance is measured in
Definition
OHMS Ω
Term
Rubber is considered an
Definition
Insulator
Term
A ______ controls the flow of current
Definition
Resistor
Term
Higher Ω, _____ resistance
Definition
More
Term
What are the main purposes of a resistor?
Definition
voltage division, biasing, current limiting, power dissipation
Term
What is a potentiometer?
Definition
Variable Resistor that controls Voltage (i.e fader)
Term
The Unit of Measure for Conductance
Definition
Siemen (S)
Term
Conductance is the opposite of ________
Definition
Resistance
Term
G is the math for
Definition
Conductance
Term
G=I/R means
Definition
Conductance=Current (A)/Resistance (R)
Term
R=I/G Means
Definition
Resistance= Current (A)/Conductance
Term
Resistance in Series: current is the _______ at all points
Definition
same
Term
The math to find Total Resistance (RT)
Definition
RT=R1+R2+R3+R4
Term
Resistance in Parallel: ______ is the same at all points
Definition
Voltage
Term
Math to find resistance in Parallel
Definition
G=1/R, R=1/G
Term
Kirchoff's First Law (AKA Kirchoffs Current Law or Conservation of Current) is
Definition
The sum of all the voltages as you go around a circuit from some fixed point and return there from the opposite direction is always zero. 
Term
Kirchoff's Second Law (AKA Kirchoff's Coltage Law or The Conservation of Voltage)
Definition
The sum of all the voltages as you go around a circuit from some fixed point and return there from the opposite direction is always zero 
Term
Node
Definition
Point of intersection in a Circuit
Term
Unit of Measure for Power
Definition
P= (watt), P=EI
Term
Energy
Definition
Power dissipated over a length of time
Term
Power
Definition
The rate at which energy is expanded
Term
Energy=1 joule=1 ____per second
Definition
Watt
Term

Math for Power

 

Definition

Lowest wattage/Highest wattage

LOG 10

make positive

x10

___ dB

Term
Direct Current
Definition
Electric current that always flows in the same direction and does not change in intensity
Term
Alternating Current (AC)
Definition

Electric Current that reverses direction periodically

(once every 1/120 of a second, complete every 1/600 of a second)

Term
Main component of a DI 
Definition
Transformer
Term
In electricity, voltage=
Definition
amplitude
Term
Inductors create
Definition
a magnetic field which push the current along and induces more current
Term
______ (L) is measured in _____ (H)
Definition
Inductance, Henrys
Term
______ slows AC and DC charge carriers (Electrons) by Brute Force
Definition
Resistance
Term

_______ impedes the flow of AC charge by

temporarily storing the energy as a magnetic field

Definition
Inductance
Term
_______  impedes the flow of AC charge carries by temporarily storing the energy as an electric field
Definition
Capacitance
Term
Capacitance (C) is measured in
Definition
Farads
Term
Caps have ______, a component of impedance
Definition
Reactance
Term
Capacitance is determined by the size of the plates and the distance between them . The closer the sheets are together, the ______ the capacitance, the _____ the rate of voltage in the plates
Definition
greater, slower
Term
Generally, Filters consist of resistive and ____ components
Definition
reactive (i.e capacitors or inductors)
Term
1 pole=
Definition
-6dB per octave (i.e 1604)
Term
MOS
Definition
Metal Oxide Semi-Conductor
Term
CMOS
Definition
Complementary Metal Oxide Semi Conductor
Term
Diodes mean current flows ____ way(s)
Definition
one
Term
Early Diodes were ____ tubes. Now they are made from _________
Definition
Vacuum, semiconductors
Term
Vacuum Tubes
Definition
Accelerate electrons to high speeds, resulting in large currents. All gasses are removed. The intensity can be changed very quickly (i.e cathode ray, tv's)
Term
Gas-filled Tubes have a constant _____ drop, no matter what the current
Definition
voltage. They are useful fr voltage regulators in high-voltage, high-current power supplies
Term
Diode Tubes are used for
Definition
rectification, found in power systems where large voltages are required for long continuous periods
Term
Rectification is
Definition
changing AC to DC, vice versa
Term
Cat Whisker was the
Definition
first semi-conductor Diode
Term
Biasing
Definition
Making sure you have the right amount of current going in and out of the tube, using potentiometers 
Term
Transistor is a
Definition
Three terminal device, basic amplifier. Almost always made of silicon. A small change in base current causes a large change in collator current and voltage.
Term
Balanced Cables have 3 _____
Definition
conductors
Term
In a Balanced Cable, Pin 1=?, Pin 2=?, Pin 3=?
Definition
Ground, Hot (+V) "live", Cold (-V) "neutral"
Term
XLR and TRS cables are
Definition
Balanced
Term
Unbalanced Cables have __ Conductors
Definition
2
Term
In an unbalanced cable, Pin 1=?, Pin 2=?
Definition
Ground, Hot (signal)
Term
RCA, TS, BNC, Banana Plug/Speak On cables are
Definition
Unbalanced
Term
Standard voltage for ____ audio gear is 1.23Vrms
Definition
pro
Term
Standard voltage for ______ audio is .32Vrms
Definition
consumer
Term
.dBV=>Reference is ___V rms
Definition
1, (root means square)
Term
.dBu=>Reference is ___ volts
Definition
.775
Term
.dBW=>Reference is ____ watt
Definition
1
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