View source for Sound Power Washing Machine IEC 704

<font size = "6">Sound Power for Cycle Machines</font></font>


The software add‐in called "SPAddin Cycle" allows a user to determine the Sound Power Level for cycle machines. It is dedicated today to the measurement of Sound Power on washing machines as defined in the standard IEC704: 6 microphones around a source fixed against a wall.

<font color="#366092"><font size = "5">'''1. Installation and run specificities'''</font></font>
*Download it here V1.02: https://orossas.sharepoint.com/:u:/g/support/EUs_-jyRcOBEnMoecotapQsBk8B7iIkCs6nv_bqCl-Hkng?e=vhbODM

* The Add‐in is installed in a second step after the standard Sound Power base module.

* After installing the software please replace the file "IEC704_PW6" (installed in the directory "C:\OROS\OROS Program files\Sound Power\Setups") by the new one provided in the directory "

* The Add‐in will install a specific "Sound Power" project in NVGate. If a user wants to use the standard Sound Power base module, they can reinstall the Base Module so that the standard "Sound Power" project will be reinstalled.

<font color="#366092"><font size = "5">'''2. Getting Started'''</font></font>

* In order to start the software in this mode one should use the load option from the setups directory: "IEC704_PW6.xls".

[[Image:Sound_power_washing_machine__IEC704_01.png|framed|none]]



<font color="#366092"><font size = "5">'''3. Application'''</font></font>

As shown in the figure below, there are two ways to determine the Sound Power level relatively to measurement start and stop:

* We consider the full phase between the Start and Stop. This is the case for the base module of the Sound Power solution.

* We cut the measurement periods in a number of cycles: for the sound power on washing machines there are two cycles: washing and spinning.
[[File:SP3.png]]


Sound Power measurements on washing machine: the system will record the full time history on the 6 microphones so that the user can choose the appropriate period. There are a number of features available thanks to the power delivered from the 3‐series analyzers: All channels are measured simultaneously, the short Leq1s are acquired, and all microphone positions are averaged simultaneously. The measurement time can be quite long: acquiring the signal over 3 hours.

[[Image:Sound_power_washing_machine__IEC704_02.png|framed|none]]

Below is a picture of the particular setup used.




[[Image:Sound_power_washing_machine__IEC704_03.png|framed|none]]

The noisiest period among several spinning events is automatically detected by the software.

[[File:SP2.png]]

<font color="#366092"><font size = "5">'''4. Software Interface'''</font></font>

During the acquisition, it is possible to acquire the 6 leq profiles (for the 6 microphones).

[[Image:Sound_power_washing_machine__IEC704_04.jpg|framed|none]]

The Sound Power level is determined during the Sound Power report session as shown below. There are 3 main steps in the data treatment. The first step is to load the data by pressing load cycles.

The second step is to process to cycles selection: A user chooses the washing period and the spinning period. The most noisy period is automatically detected The data are used for the final Sound Power Reporting.

[[File:SP.png]]