deciBel Screenshots

Fast Mode

This is the default screen. It displays the current, maximum and minimum sound pressure levels in decibels and a moving dB x time chart.
The display and the chart are updated every second and the chart data flows continuously to the right so that it shows the last 5 minutes of recording at any
time.

Main Menu

The phone menu button brings up the deciBel main menu with options to rotate the display, call the calibration tool and to show the About and Help screens.

Rotated Display

Selecting the Rotate Display option in the main menu causes the sound pressure display and the selected chart to rotate 180 degrees.
This can be very handy if you wanto to point the mic, which is located at the bottom of the phone, to the sound source.
Note that only the display and the chart are rotated, not the whole screen.

Context Menu

If you touch the chart image for 2 seconds this context menu will show up.
Select one of the options to change the Mode, reset the Max and Min displays or to save a chart screenshot to the sdcard.
Unlike the phone menu button, which can emit a click, the context menu is silent and does not disturb the measurement.

Slow Mode

In this mode the chart is updated once each 15 seconds and you can resize the time axis to 15, 30, 60 or 120 minutes.
The chart shows three lines: The 15 second average in orange, the minimum (in each 15 seconds) in yellow and the maximum in red.
Once the chart data covers the whole selected time span, it begins to flow to the right.

Accumulated Exposition Time

This mode is a histogram that shows how many time the device (and the people around it) was exposed to each sound pressure level since the beginning of the measurement.
The time axis starts in seconds and evolves to minutes and then hours. The sound pressure levels are 5dB wide.
It ressembles the functionality of a sound level dosimeter.

Calibration Panel

Use this screen to trim the deciBel sound pressure meter to your particular hardware to achieve more precise measurements.
Even high end sound pressure level meters must be trimmed from time to time due to inevitable changes in hardware characteristics.
To trim deciBel, compare it to a calibrated SPL meter or a dedicated calibrator and touch the arrows until the readings become compatible. Then select Menu -> Save.

Launcher Icon