sound modulation

screen equalizer oscilloscope oscillograph monitor monitor screen sonar radar echo-sounder fathometer scientific science sciential technique technology engineering technics recorder pulse momentum impulse impetus impulsion impact sound tune bell blast noise sinusoid tachograph modulation electronic test seismogram sonic radar radiolocator radiodetector wave signal grid modulation signal beep horn call cue audiogram cardiogram encephalogram diagram chart figure graph pattern plot template sample model shape vector metallic metal metalline tin-pan brassy ironwork iron gray