SPL (deciBel) Meter that includes RT60, Leq, Spectrum Analyzer, Spectrogram, Chart Recorder, Sign Generator, Polarity Checker, and Mic calibration.
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Features: 1/1, 1/three & 1/6 octave RTA modes, Leq (wideband, Octave, variable period), RT60 (wideband, Octave), Peak Retailer, Spectrogram, Peak frequency, Quick, Medium & Sluggish filters, Flat & A/C Weighting and movie trade X Curve, Averaging, SPL Chart Recorder, Noise Standards, White/Pink Noise, Sine, Sq., Triangle, Sweep, Log Sweep, Warble, Ramp and Impulse alerts & loudspeaker polarity checker, L/R choose. RTA Retailer & Load, Hann home windows, pinch to zoom, scroll to middle.
Unique ISO 1/three Octave Calibration – can appropriate to your telephone’s microphone response. Octave calibration discs are moved up or right down to acquire a flat response, and match the general SPL to that of an exterior meter. Save/Restore of Cal recordsdata (widespread Dayton Audio iMM-6 additionally supported).
Use: gig measurements, dwelling theater, acoustics, automotive, and so on.
AudioTool FFTs units of microphone samples. Aliasing diminished by Hann windowing. SPL calculated in realtime. Spectra could also be saved, then loaded and displayed with the reside spectrum. The “Retailer” button shops the present reside spectrum – “Load” exhibits an inventory of saved spectra to pick.
To cover the buttons, faucet the display. To revive them, faucet once more. To zoom the dimensions, pinch the display. To maneuver the dimensions, drag it up or down (left or proper).
The deciBel meter makes use of IIR filters and exponential averaging to calculate Flat, A and C and X weighted response at speeds of Quick, Medium and Sluggish.
A pair of cursors might be proven: every might be moved to any place, and can show the SPL & time/frequency values there. Initially, each cursors are initially positioned mid-screen – merely drag them to a brand new place with the fingertip. The cursors might be turned on and off within the Menu.
The loudspeaker polarity checker can be utilized to verify whether or not a loudspeaker is wired in part: join the AudioTool output to the speaker below take a look at, choose “Polarity” from the sign generator display, then return to the RTA display. If the speaker is out of part (polarity reversed) AudioTool will present “Pol —“, in any other case “Pol +++” if the speaker is in part.
The Noise Standards (out there from the Menu) perform exhibits a set of NC contours overlaid on the 1/1 Octave RTA show and the calculated actual time present NC worth can also be proven.
The Chart Recorder exhibits a shifting hint of the SPL measurements over the previous few minutes.
RT60 measurements might be made through the “RT60” button, after which utilizing a loud clap (or related) to set off the measurement. RT60 will also be used with Pink Noise from the AudioTool generator. RT60 instances measure how a lot reverberation or echo there’s in a room, area or venue.
The Sign Generator generates White and Pink Noise, Sine, Sq., Triangle and Ramp waves, Sine Wave Linear and Log Sweeps, Warbles and Impulses. The generator makes use of a number of cycled buffers, refreshed randomly so making certain actually random White/Pink noise. Pink Noise algorithm makes use of Kemmet’s methodology to regulate White into Pink.
The frequency accuracy of the generated periodic alerts is often round 1%. Sine wave constancy is nice all through many of the audio vary. Different alerts’ main and trailing edges present ringing and lowering frequency response artifacts within the higher ranges, relying on the Android used.