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[Home Theater Network HDAV.com.CN] Room acoustics has always been one of the important topics of private cinemas, creating a reasonable and effective room for a private cinema that is qualified in all aspects except for equipment selection and sound calibration. Acoustic processing is very important. Room acoustic measurement is a very complex project that requires professional acoustic analysis instruments and professionals. But for the average user, professional acoustic analyzers and professionals are an unreachable thing for them.
The XTZ Room Analyzer II Pro has been asked for many years, and it is also used as one of the tools for testing room acoustics. Compared to the standard version, the test microphone and sound card used in the professional version are more powerful, and the functions of the software part are more powerful. Also more, the measurement accuracy is higher, so it is also highly praised in the industry. The emergence of XTZ Room Analyzer II Pro provides a convenient and effective test platform for many enthusiasts. It can quickly analyze the main parameters of room acoustics, understand the basic acoustic characteristics of the room, and make appropriate acoustic treatments. Relatively better sound.
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Easy interface operation
The use of XTZ requires the software to be installed at the same time, so connect the device as shown in the illustration before use, and download the corresponding software from the official website of XTZ. In the interface, the XTZ Room Analyzer II Pro has expanded its functionality. The newly upgraded Professional Edition has the Found Room Modes function, which can quickly find out the nodes of the room and calculate the DSP products using XTZ or similar. The recommended parameters for the parametric equalizer to compensate.
High precision sound pressure meter
The left side of the XTZ software interface is a sound pressure meter that displays five kinds of peaks and average sound pressure in real time. When the sound signal is transmitted, the sound pressure meter changes with the change of sound pressure, which is convenient for the user to measure the current sound pressure value in real time. .
From top to bottom:
LCpk hold shows the highest sound pressure from start/reset
LCpeak shows continuous peak levels including short bursts of time
LAF hold Displays the highest level tested by the current setting.
LAF displays the average level of the currently set test.
LAeq (Professional Features) Displays the instantaneous sound pressure of the selected frequency curve. The combination of LAF characters will also change as the settings change.
LCpeak level is shown with green lines
LAF/LASpeak is shown with yellow lines
Timer displays the running time of the meter since the start or last reset.
Reset resets all means (Professional features)
Pause freezes all counts (Professional features)
The menu selection box below toggles between weighted frequency curves
A-weighted: Simulates the frequency response (LAF) of the ear at low sound pressure
C-weighting: Simulating the frequency response (LCF) of the ear at high sound pressure
Z-weighted: unweighted 10Hz-20kHz frequency response curve (LZF)
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Frequency response curve display: The displayed frequency response range is 16-250Hz.
Test button: Measure
Test output sound pressure control bar: It is generally recommended that the loudness reaches 90 decibels, which should be based on the actual hearing. Red = level too high, green = moderate level, blue = low level.
Smoothing is a way to flatten the test results chart.
It can be processed with different resolutions.
It depends on the balance between the equipment you use and your personal choice.
Resolution can be 2 ppo, 3 ppo and 6 ppo (ppo –Points)
Per Octave octave point).
XTZ three major mode selection
From the interface, XTZ's software interface can be divided into three major modes: Room Mode analysis, RTA (real-time analyzer), Full Range (full-frequency analysis).
1, Room Analyzer room mode
Use a graph to reflect the average frequency response of the room
2, RAT: real-time analyzer
Used to measure the energy level of each frequency band in the room.
3, FULL RANGE full frequency analysis
Provides higher resolution for displaying 3D 3D frequency response waterfall maps.
(1), Room Mode (room mode)
The room mode can quickly detect the standing wave node and EQ node of the room. The frequency range of the room is 16-250Hz, which allows the user to find out the problem of the room more intuitively through the form of curve analysis. And XTZ also provides tests in three different locations, and the test results are more accurate, which helps to find problems in the room mode. Before performing the analysis, you need to set the weighting value and analysis accuracy (the default is 12ppo). Just press the “Measure†button in the upper right corner of the interface to analyze. Generally, in the choice of A-weighting and C-weighting, we all use A-weighting as the default option.
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The blue curve is a standard curve and represents the frequency response of the test.
The green curve shows the frequency response of the room mode and the recommended EQ adjustment for the discovered room mode. The found room mode "Found Room Modes" value is displayed as a green curve.
Shown is the expected curve after the parameter equalizer PEQ uses the recommended parameters. The correction is processed according to the values ​​presented in the found room mode "Found Room Modes".
After the test, the room node and the EQ node are displayed, and the mode Mode room resonance point needs to be processed first. The equalizer EQ can be adjusted with the EQ of the amplifier or by changing the acoustic processing.
(B), RTA (real-time analyzer)
The RTA can replay the test signal through the audio and video equipment to analyze the frequency response of the room in real time. In terms of measurement accuracy, the XTZ Room Analyzer II Pro has an accuracy of 1/3 octave. Measure) Start the test program and click Paused to stop the test program. Each bar graph represents the sound pressure value of each frequency displayed below the sound pressure (SPL) pattern of a fixed frequency band. The RTA shows the real-time frequency response. It measures the energy level of each frequency in the room, so the resulting curve is different from the result of the sweep signal measurement. The RTA shows that the test level is displayed with 1/3 octave accuracy and continuously moving average (averaging for short time windows). Although it does not have the resolution of room analyzers or full-range measurements, it still provides a good reference for sound adjustment. Click on “Listen†to activate the listening mode, which allows you to listen to changes in the sound at any time after adjustment, but not for adjustments. In addition, RTA is best for adjusting the speaker or subwoofer position, looking for the best listening position or checking the frequency response when adjusting the graphic equalizer, so real-time analysis of RTA is very effective in subwoofer debugging.
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(C), Full Range (full frequency test)
In the full-frequency analysis function interface, three modes of Anechoic, Ambient, and Unprocess are provided. At the same time, RT60 reverberation time can also be analyzed, and the analysis results can be displayed in the form of curves and waterfall charts. The measurement is started by clicking the "Measure" button and the test is completed after four sine sweeps. It can provide a variety of information, first the frequency response of different window settings, the waterfall chart shows the test involving time, and finally the RT60 parameter. They are all displayed in a bar chart with a decay time above each column. Testing at longer distances often results in dents at low frequencies. This is due to the serious impact of the room 35/40, the placement of the microphone and speaker. To understand the actual performance of the subwoofer or subwoofer, a near field test is required to avoid the room's impact on the test results.
Conclusion: The XTZ Room Analyzer II Pro analyzer plays a supporting role in the analysis of the acoustic environment, and the operation is simple and easy to understand. It can quickly analyze the acoustic problems in the listening environment, and can quickly analyze the main parameters of the room acoustics, let us know the basic acoustic characteristics of the room in time, and make appropriate acoustic treatment to get a relatively better sound. . More fresh and fun home theater information, please pay attention to home theater network (WeChat: cnhifi) http://, the country's most influential home theater audio player interactive media website. Click here to buy >>
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