Measurements

A measurement stands for one measuring point. It contains its settings (value profile, day boundary, offsets, leveler) and all recorded data. A measurement can run over many days and be started and stopped as often as you like.

Flow

create / import
        │
        ▼
     open ──activate──▶ active ──Start──▶ running ──Stop──▶ active (stopped)
        ▲                  │                │ sensor gone   ▲
        │             deactivate            ▼               │ sensor back
        └──────────────────┘           interrupted ─────────┘
        │
    complete ──▶ completed ──re-open──▶ open

• Activate: at most one measurement is active at any time; SPL Sense records only into it. You can only switch when the active measurement is stopped.
• Start and stop: Start needs a connected sensor. Stop asks for confirmation. If the leveler is active, SPL Sense points out that it will be switched off when stopping.
• Interrupted: if the sensor is unplugged or delivers no values for 20 seconds (for example because the computer was asleep), the measurement is interrupted. When the sensor delivers data again, it continues by itself. You end an interrupted measurement with Stop.
• Deactivate: Measurement menu › Deactivate. The measurement remains open but is no longer active.
• Restart of SPL Sense: after a restart, no measurement is active. If a measurement should continue automatically, use autonomous mode.

Create

On the overview, New measurement:

A new measurement is not yet active. Its leveler is set to SPL Tools L1 (USB) and mode Off.

Edit

Measurement menu › Edit Measurement. Possible as long as the measurement is not running, not interrupted and not completed. You can also edit a measurement that is not active while another one is recording.

• Name, Day Boundary
• Cloud Uplink: switching it on uploads all data of the measurement, including what was already recorded. Switching it off stops the upload; what is already in the cloud stays there.
• Offsets for A, C and Z, see below
• Value Profile: adjust it with Edit Value Profile

If you change the day boundary or value profile, SPL Sense recalculates the limits and measurement days. Every change of the offsets and of the value profile appears in the events.

You edit the leveler settings separately; they can also be changed during the measurement.

Offsets

The offset converts the values at the measuring position to the loudest place in the audience. How to determine it is described under Measuring point and offset.

There are two ways:

• Tune offsets (Measurement menu): with live values. Only for the active, stopped measurement with a connected sensor. The table shows, per weighting, the current level, the highest level since Reset max values, the offset and both values including the offset. Nothing measured here is recorded.
• Edit Measurement: enter offsets directly as numbers, for example from a measurement with a handheld meter.

A changed offset applies from the next start. Data already recorded keeps the offset it was recorded with.

Complete and re-open

When the event is over, complete the measurement: Measurement menu › Complete measurement. The measurement must be stopped. After that it is locked: it can no longer be activated, edited or started, but it can be viewed and exported. If autonomous mode is set to this measurement, it is switched off.

You re-open a completed measurement in the menu with Re-open measurement.

Deleting

You delete an open measurement under Edit Measurement › Delete measurement, a completed one in the Measurement menu. It is only deleted on this computer; what is in SPL Cloud stays there. How to delete the measurement in the cloud as well is described under Measurements in the cloud.

Import and export

A measurement can be backed up as an .splsense file and read in again on another computer, with all data and settings.

• Export: complete the measurement and click Export measurement.
• Import: on the overview, Import, then drag the file into the field. If the measurement already exists, you can replace it with Overwrite existing measurement.

You export the values as a table in CSV format, see Measurement data.