DataHand Professional II Manuel d'utilisateur télécharger pdf (Page 3)

The sound level depends on the position in the rooms, so several microphone positions are used to measure

the average of the source room level, L1, the average of the receiving room level L2 and the average of the

background noise level B2. The average reverberation time T2 is also measured using several positions.

In Touch with your Measurements

The spectra required (L1, L2, etc.,) may be measured in any order, to suit field conditions and your

preferences. Fig. 4, Fig. 5 and Fig. 6 show typical displays when performing both single- and 2-channel

building acoustics measurements.

Fig. 4 shows a typical building acoustics display when you are ready to measure the first L2 position, with

source position 1.

Fig. 4

Typical single-channel

display when you are

ready to measure the

first L2 position, with

source position 1

The instantaneous (live) spectrum is shown and the high-resolution, colour, touch screen shows the setup,

status and data at a glance.

Using the stylus (or navigation pushbuttons) you can directly activate the indicated features (except those

with dashed lines in Fig. 4 above).

You can check the generator and loudspeaker signal level by tapping the Generator icon to switch the

generator on and off.

Fig. 5

Typical single-channel

display

Left: Inspection phase

Right: Save phase

Once the spectrum at position 1 has been measured (for the preset time of 10 s), you may inspect the

spectrum before saving (see Fig. 5, left).

A yellow ‘smiley’ icon indicates that you may be able to improve the measurement at one frequency band.

Tap the smiley icon to read the explanation and take the necessary action.

Standard

Function

Broadband Levels

Path

Spectrum

Task

Sound Field

Position

Instant. Level

Clock

View Tabs

Menus

Parameter

Y Scale

Cursor

Spectrum (Instant.)

Spectrum (L

)

Elapsed Time

Measurement Status

Generator

Data saved

L2 (average)

Data not yet saved

Ready for Pos. 2

Smileys

1 2 3 4 5 6 7 8 ... 15 16

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DataHand Professional II Manuel d'utilisateur Page 3

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