Term
| what does the Greek 'micro' and 'phon' stand for |
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Definition
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Term
| who coined the name microphone |
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Definition
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Term
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Definition
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Term
| what does a transducer do |
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Definition
| convert acoustic energy into electrical energy |
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Term
| another name for carbon mics |
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Definition
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Term
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Definition
| contain a section filled with carbon granules and the vibration of the diaphragm |
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Term
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Definition
| the vibration of the diaphragm of a carbon mic causes teh granules to be compressed over time |
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Term
| what were carbon mics used for |
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Definition
| military applications and telephone handsets |
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Term
| what does piezin stand for |
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Definition
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Term
| who discovered the Piezoelectric effect |
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Definition
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Term
| how do Ceramic/Crystal miss operate |
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Definition
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Term
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Definition
| quartz, tourmaline, Rochelle salt, cane sugar, barium titanate |
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Term
| can you apply Phantom Power to a crystal mic |
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Definition
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Term
| what mics use Piezoelectric materials |
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Definition
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Term
| what principle operates Magnetic/dynamic/ribbon mics |
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Definition
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Term
| FaraDays Law of Magnetic Induction |
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Definition
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Term
| what does the 'e' of e=Blv stand for? |
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Definition
| electromotive force in volts |
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Term
| what does the 'B' of e=Blv stand for? |
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Definition
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Term
| what does the 'l' of e=Blv stand for? |
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Definition
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Term
| what does the 'v' of e=Blv stand for? |
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Definition
| velocity of the conductor moving through the magnetic field |
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Term
| what is the combination of ribbon and magnets considered |
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Definition
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Term
| what will doubling ribbon length do |
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Definition
| yield a 6dB increase in output, but causes a loss of high frequency |
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Term
| can you use Phantom Power with a Ribbon mic |
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Definition
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Term
| how thick is a ribbon in a ribbon mic |
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Definition
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Term
| another name for condenser mics |
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Definition
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Term
| who developed condencer mics |
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Definition
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Term
| who first mass produced condencer mics |
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Definition
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Term
| before placing a mic on a stand ensure: |
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Definition
the boom is extended over a leg
body screwed into boom tightly |
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Term
| how to store mics with magnetic structures |
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Definition
| in their protective felt bags |
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Term
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Definition
carbon
ceramic/crystal
magnetic/dynamic
ribbon
condeser |
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Term
| the size of carbon granules in carbon mics |
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Definition
| approximately 100 microns |
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Term
| how to fix packing problem in carbon mics |
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Definition
| gently rap against a hard surface |
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Term
| what does piezein stand for |
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Definition
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Term
| when was the Piezoelectric effect discovered |
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Definition
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Term
| what is the piezoelectric effect |
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Definition
| an electrical voltage is created when the piezoelectric material is subjected to mechanical stress |
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Term
| how does a crystal mic operate |
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Definition
| sound waves hitting the diaphragm put pressure on the piezoelectric material causing a voltage |
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Term
| type of transducer found in acoustic guitar pickups |
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Definition
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Term
| Another name Magnetic-Dynamic Microphones |
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Definition
| electrodynamic or electromagnetic mics |
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Term
| how do magnetic-dynamic mics operate |
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Definition
| the principles of magnetic induction |
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Term
| who discovered magnetic induction |
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Definition
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Term
| Faraday's Law of Magnetic induction states.... |
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Definition
| moving a conductor (coil of wire) through a magnetic field will cause a voltage to be induced across the conductor |
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Term
| amount of voltage induced in magnetic induction is proportional to... |
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Definition
magnetic field strength
length of the conductor
velocity of conductor moving through the magnetic field |
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Term
| shape of modern dynamic mics |
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Definition
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Term
| what are dynamic mic diaphragms usually made of |
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Definition
| plastic or coated with aluminum |
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Term
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Definition
| coil of wire wrapped around the dome |
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Term
| sensitivity of dynamic mics |
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Definition
| less responsive to transient frequencies due to the size of the diaphragm |
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Term
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Definition
| outside measurement range |
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Term
| size of the ribbon in ribbon mics |
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Definition
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Term
| sensitivity of the ribbon mic determined by: |
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Definition
ribbon thickness
corrugations per inch
tensioning |
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Term
| where is the ribbon of a ribbon mic suspended |
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Definition
| between the poles of a strong magnet |
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Term
| output of a ribbon mic dependent on: |
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Definition
conductor length
movement of the conductor in the magnetic field
magnetic field strength |
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Term
| only practical means of increasing output voltage of a ribbon mic |
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Definition
| increasing magnetic field strength |
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Term
| transient response of a ribbon mic |
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Definition
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Term
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Definition
| 8.5lbs (due to size of magnet) |
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Term
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Definition
| a nano-enabled material or acoustic nano-film that makes the ribbon extremely strong |
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Term
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Definition
| Soundwave Research Laboratories |
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Term
| how does a condenser mic operate |
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Definition
two parallel metal plates, each holding an opposing charge, creates a capacitor
sound hits the diaphragm changing the distance causing change in capacitance
sent to a circuit taht translates this change into an electrical signal that is analoguous to the sound wave |
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Term
| what are the two metal plates of a condenser mic |
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Definition
| the diaphragm and the backplate |
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Term
| what is the diaphragm in a condenser mic made of |
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Definition
| thin piece of metal or plastic, such as Mylar, coated with gold or nickel |
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Term
| thickness of the diaphragm in a condenser mic |
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Definition
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Term
| how is the backplate of a condenser mic constructed |
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Definition
| usually made of milled brass with a number of holes drilled into it |
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Term
| what are the holes in the diaphragm of a condenser mic for |
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Definition
| provide damping, acting as a spring of sorts |
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Term
| what does a condenser mic require |
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Definition
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Term
| what can the preamp of a condenser mic be |
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Definition
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Term
| how does an electret condenser mic make capacitance |
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Definition
| permanent static electric charge |
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Term
| what is power from battery or phantom used for in an electret condenser mic |
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Definition
| power the mics internal pre-amp |
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Term
| what is used to power a condenser mic |
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Definition
external power supply unit (PSU)
phantom power
battery |
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Term
| what are the 3 voltages for phantom power |
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Definition
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Term
| what does the basket of a condenser mic do |
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Definition
protect the capsule from physical damage
protect from stray RFI |
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Term
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Definition
| a plot that describes the sensitivity of a mic to sounds arriving from any direction over a 360 degree range |
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Term
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Definition
| sounds that arrive at the 0 degree position relative to the mic capsule |
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Term
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Definition
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Term
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Definition
| sound that arrive from angels other than the 0 degree position relative to the mic capsule |
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Term
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Definition
| equal sensitivity to sounds from all directions |
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Term
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Definition
| sensitive to sounds arriving from the front and rear |
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Term
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Definition
pressure microphone: omni
pressure gradient: bidirectional |
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Term
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Definition
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Term
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Definition
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Term
| Altec/Western Electric 639 |
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Definition
| has both a ribbon and a diaphragm |
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Term
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Definition
figure 8 (bi)
Super-Cardioid
Hyper-Cardioid
Cardioid
Sub-Cardioid
Omnidirectional |
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Term
| how polar patterns are created electrically in condensers |
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Definition
a pair of cardioid capsules are mounted back-to-back
(outputs are combined to create other polar patterns) |
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Term
| creating omni pattern electrically |
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Definition
| equal amount + from each cardioid capsule |
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Term
| creating bidirectional pattern electrically |
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Definition
| equal amount + from one and - from the other |
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Term
| creating cardioid electrically |
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Definition
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Term
| creating super/hyper cardioid patterns electrically |
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Definition
| more + from one and less - from the other |
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Term
| creating sub cardioid electrically |
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Definition
| more + from one and less + from the other |
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Term
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Definition
| as the distance from the source decreases, microphones with directional polar patterns will exhibit an increase in low frequency response |
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Term
| amount of dB increase in Shure 57 at 100 Hz when placed 1/4" from the sound source |
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Definition
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Term
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Definition
has extended low frequency pickup
less proximity effect than directional mics |
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Term
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Definition
pattern usually very even except at highest freqs
more proximity effect than cardioid or hyper-cardioid |
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Term
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Definition
| most sensitive to sounds arriving from the front while rejecting sounds from the rear |
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Term
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Definition
| sensitive in a slightly narrower pattern in the front than a cardioid and has a small lobe at the rear |
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Term
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Definition
| sensitive in a narrower pattern in the front than a cardioid and has a prominent lobe at rear |
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Term
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Definition
| extremely narrow area of sensitivity in front with extended "reach" also has multiple lobes which vary in position with frequency |
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Term
| how is the shotgun pattern created |
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Definition
| using an interference tube |
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Term
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Definition
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Term
| coverage angle of cardioid |
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Definition
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Term
| coverage angle of supercardioid |
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Definition
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Term
| coverage angle of hypercardioid |
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Definition
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Term
| coverage angle of bidirectional |
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Definition
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Term
| angle of max rejection in cardioid |
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Definition
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Term
| angle of max rejection in supercardioid |
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Definition
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Term
| angle of max rejection in hypercardioid |
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Definition
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Term
| angle of max rejection in bidirectional |
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Definition
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Term
| rear sensitivity (relative to front) of onmi |
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Definition
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Term
| rear sensitivity (relative to front) of supercardioid |
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Definition
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Term
| rear sensitivity (relative to front) of hypercardioid |
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Definition
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Term
| rear sensitivity (relative to front) of bidirectional |
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Definition
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Term
| ambient sound sensitivity of omni |
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Definition
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Term
| ambient sound sensitivity of cardioid |
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Definition
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Term
| ambient sound sensitivity of supercardioid |
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Definition
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Term
| ambient sound sensitivity of hypercardioid |
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Definition
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Term
| ambient sound sensitivity of bidirectional |
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Definition
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Term
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Definition
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Term
| distance factor of cardioid |
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Definition
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Term
| distance factor of supercardioid |
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Definition
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Term
| distance factor of hypercardioid |
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Definition
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Term
| distance factor of bidirectional |
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Definition
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Term
| distance factor of sub-cardioid |
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Definition
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Term
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Definition
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Term
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Definition
| max level possible with a certain amount of measured distortion |
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Term
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Definition
| total dynamic range of the mics internal pre-amp |
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Term
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Definition
| measured in millivolts per Pascal |
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Term
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Definition
| pressure and pressure variations are expressed in Pascals (Pa) or N/m2 |
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Term
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Definition
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Term
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Definition
| comparing sound pressure levels in decibels to pascals |
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Term
|
Definition
Real Time Analyzers
FFT analyzers |
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Term
|
Definition
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Term
|
Definition
used to maintain safe working conditions
used to prevent violation of sound level and noise pollution laws |
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Term
|
Definition
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Term
| what is generated commonly by calibration devices |
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Definition
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Term
| what is less commonly generated by calibration devices |
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Definition
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Term
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Definition
| allow sound to reach the rear of the capsule/diaphragm, to create cardioid, super cardioid, and hyper cardioid patterns |
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Term
|
Definition
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Term
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Definition
| measurement similar to how our hearing works |
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Term
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Definition
| measurement close to overall sound level |
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Term
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Definition
| small diaphragm electret condensers, extremely flat frequency response omnidirectional pattern |
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Term
| used to calibrate sound pressure measurement devices |
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Definition
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