PLACID PSE Sound express

Sound express software
Sound level meter module

Overview

PLACID SoundExpress is a software developed by PLACID Instruments for testing acoustic indicators. It has functions for sound power, material test, sound pressure level, and sound intensity. The functions of the sound level meter module are described in detail in this datasheet.

Function

The selection settings include:
(top to bottom, left to right in the above image):

1. Selecting the duration of the test: Continuous Samples>is a continuous test, Finite Samples>is a selected time
period for testing, and Time of Duration>can select the number of seconds to be tested;
2. <Weighting>: Linear, A-weighting, B-weighting, and Cweighting are options.
3. In<Time mode>, you can select <Slow>,<Fast>,<Impulse>, and <Custom>. The Custom>file’s data acquisition frequency is one of them.
4. During the testing process, save the SPL and 1/3 octave data by clicking the two Save>buttons.
5. In <“File Prefix>,” you can enter the name of the file you want to save.

The measured data includes:
✓RMS value: It is the linear average of all measured values at a sampling point
✓Sound pressure value: The value of the sound pressure level, calculated using time weighting,showing how much it has changed over time.
✓Maximum value: The maximum SPL value in the overall measurement time
✓Minimum value: The minimum SPL value in the overall measurement time
✓Peak value: The time-domain signal’s highest possible positive value over the course of the entire measurement time
✓Equivalent continuity: by integrating the RMS value, the equivalent continuous sound pressure level in the entire measurement time
✓Sound exposure: The level of sound exposure over the course of the entire measurement, as determined by integrating the RMS value
✓L10: The noise level that exceeds 10% of the total measurement time is equivalent to the noise’s average peak.
✓L50: The noise level that exceeds 50% of the total measurement time is equivalent to the noise’s average peak.
✓L90: The noise level that exceeds 90% of the total measurement time is equivalent to the noise’s average peak.

<Time>Module: the ratio of the calibrated sound pressure to the sound signal over time. Because it only has reference significance and displays the level of the sound pressure signal over a specific time period, this module data will not be saved automatically.

<SPL>Module: Displays a time-varying variation curve for the sound pressure level values included in the time weighting. This data is automatically saved.

<Statistics>Module: The following sound pressure levels can be observed.

-L10: In the overall measurement time, 10% of the time noise is greater than the sound level value

-L50: In the overall measurement time, 50% of the time noise is greater than the sound level value

-L90: In the overall measurement time, 90% of the time noise is greater than the sound level value

<1/3 Octave>Module: Display the 1/3 octave spectrum.

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