Q meter
psophometer
filter
extremely low frequency
tune
multipactor
frequency multiplier
radiofrequent
scanner
hi-fi
milliammeter
voltammeter
measuring stick
coherer
voltameter
measuring rod
measure
ringer equivalence number
autodyne
resonator
phantom power
rock
equalize
channel
audiometer
electrical circuit
prescaler
television channel
pulse counter
sonometer
radioemitter
acoustoelectronics
harmonic
wavemeter
time signal
spectrum analyzer
cymometer
keyboard bass
Rogowski coil
subcircuit
oscillograph
electroencephaloscope
sphygmophone
circumferentor
compressor
radio frequency integrated circuit
tweeter
radio cassette recorder
ultraharmonic
detector
boot
scaler
ondometer
phonometer
electronic scanner
pentaband
altigraph
ometer
radiodetection
subharmonic
tuning
wobbulator
vibrograph
electronystagmograph
electric
expander
digital
magneto-dynamic microphone
dynamic microphone
dial
mic
ondes martenot
Kundt's tube
ammeter
equaliser
bandpower
harmonic analyzer
quadband
mini hi-fi system
loop
mike
tank circuit
equalizer
rheometry
microphone
downconversion
cardiotachometer
Machmeter
crossband
subwoofer
kicksorter
reading
transverter
pulse height analyzer
radio
telethermograph