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Octopus

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4.58/5
(315 betyg)
Statistik


QR Kod

Pris
ca 45,17 kr

Version
5.7.1

Nedladdningar
10 000-50 000
Estimate :
10 032

Storlek
548.9 KB

Kategori

AudioTool

Available in :
Android SPL & RT60 Meter, Spectrum Analyzer, Signal Generator and Polarity Checker

Features 1/1, 1/3 and 1/6 octave RTA modes, RT60 (wideband and 1 Octave), spectrogram, peak frequency, Fast, Medium & Slow filters, Flat & A/C Weighting, Averaging, SPL Chart Recorder, Noise Criteria, White/Pink Noise, Sine, Square, Triangle, Ramp and Impulse signals and loudspeaker polarity checker. Frequency spectrum store & load, von Hann windowing, "Keep Screen On"

Use: home theater, audio engineer, car audio, etc

Please join the AudioTool Discussion Group if you want to request features or report problems:

http://groups.google.com/group/audiotool-discussion-group

AudioTools's Spectrum Analyzer component uses FFT on batches of samples recorded at the microphone. Hann windowing reduces aliasing. Recorded spectra may be stored as files on the SD card, and then loaded later and displayed together with the live spectrum.

(The "Store" button will store the current live spectrum with a filename of your choice. The "Load" button brings up a list of stored spectra. One of these can be chosen, or the "Cancel" item selected to return to the main display, or the "Clear" item selected to remove the currently loaded spectrum.)

Data collection can be paused and restarted.

To hide the buttons, tap the screen. To restore them, tap again.

The deciBel meter component uses IIR filters and exponential averaging to calculate Flat, A and C weighted response at speeds of Fast, Medium and Slow.

A pair of cursors can be shown on the RTA and Chart Recorder displays: each can be moved to any position, and will display the SPL & time/frequency values measured there. Initially, both cursors are positioned mid-screen - simply drag them to a new position with the fingertip. The cursors can be turned on and off in the Menu.

The loudspeaker polarity checker can be used to check whether a loudspeaker is wired in phase: connect the AudioTool output to the speaker under test, select "Polarity" from the signal generator screen, then return to the RTA screen. If the speaker is out of phase (polarity reversed) AudioTool will show "Pol ---", otherwise "Pol +++" if the speaker is in phase.

The Noise Criteria (available from the Menu) function shows  a set of NC contours overlaid on the 1/1 Octave RTA display and the calculated real time current NC value is also shown.

The Chart Recorder shows a moving trace of the SPL measurements over the last few minutes.

RT60 measurements can be made by starting the RT60 component and using a loud clap (or similar) to trigger the measurement. RT60 times measure how much reverberation or echo there is in a room or auditorium.

The Signal Generator generates White and Pink Noise, Sine, Square, Triangle and Ramp waves, and Impulses. The generator uses multiple cycled buffers that are refreshed randomly so ensuring truly random White/Pink noise. The Pink Noise algorithm uses Kemmet's method to adjust White Noise into Pink.

Wave frequency is set using the arrow buttons or directly via the keyboard. The upper display shows the sound picked up by the microphone in real time. This can be useful for evaluating the response to an audio system being fed with the generated sound. Better results can be obtained by using a headset adapter/splitter that allows an electrical signal to be sent from the device to the audio system.

The Impulse signal is a delta issued approximately once per second. Impulses can be used to measure the frequency response of audio systems: they have a flat frequency distribution.

The accuracy in frequency of the generated periodic signals is quite good: on the Motorola Droid, errors were of the order of 1% throughout most of the range. Sine wave fidelity is good throughout most of the audio range. Other signals' leading and trailing edges show ringing and decreasing frequency response artefacts in the upper ranges.

Please send email, or post on the Discussion Group if you need help or have questions or problems.

De senaste ändringarna:
v4.5   Adds 1 Octave RT60 measurement to wideband RT60

Innehållsklassificering: Ingen åldersgräns


iPhone relaterade till AudioTool

AudioTool var utvecklad för Android av jjbunn

Paketnamn : com.julian.apps.AudioTool

Systembehörigheter : 4 Klicka för att visa/dölja listan
  • android.permission.RECORD_AUDIO
  • android.permission.MODIFY_AUDIO_SETTINGS
  • android.permission.WRITE_EXTERNAL_STORAGE
  • android.permission.READ_EXTERNAL_STORAGE

I am the developer of this Application !
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efter En av Googles användare the 12/10/2011

Tool for Pro's A must have for every soundtech / installer / serviceguy. Does what it say, and good!

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