The use of sound level meter (also known as: noise meter, volume meter):
Sound level meter, also known as noise meter, is an instrument used to measure the sound pressure level or sound level of sound. It is the most basic and most commonly used instrument in acoustic measurement. With the development of the national economy and people's material and cultural living standards The noise census and environmental protection work have been carried out in an all-round way. The machinery manufacturing industry has taken noise as one of the important quality indicators of products. Buildings such as auditoriums and gymnasiums not only require beautiful appearance, but also pursue sound effects, which makes the sound level meter applications are becoming more and more extensive. Now it is not only used in acoustic and electroacoustic measurement, but also has been widely used in machine manufacturing, architectural design, transportation, environmental protection, medical and health and national defense engineering and other fields, becoming an acoustic measurement instrument that almost all departments must have .
Whether the sound level meter is used correctly or not directly affects the accuracy of the measurement results. Therefore, it is necessary to introduce the use of sound level meters.
1. Selection of sound level meter usage environment: Select a representative test site. The sound level meter should be left off the ground and away from the wall to reduce the additional impact of reflected sound from the ground and wall.
2. Weather conditions require that the sound level meter should keep the microphone diaphragm clean when there is no rain or snow, and a wind hood must be added if the wind is above level 3 (to avoid wind noise interference), and the measurement should be stopped for strong winds above level 5.
3. Open the carrying case of the sound level meter, take out the sound level meter, and put on the sensor.
4. Put the sound level meter in A state, check the battery, and then calibrate the sound level meter.
5. The comparison table (generally common ambient sound level reference), adjust the measurement range.
6. You can use fast (measure the instantaneous value of the environment where the sound pressure level changes greatly), slow (measure the average value in the environment where the sound pressure level changes little), pulse (measure the pulse sound source), filter ( measurement frequency band sound level) various functions to measure.
7. Record data as needed, and can also connect to a printer or other computer terminals for automatic collection. Organize equipment and put it back in place
1. How to use the sound level meter
(1) Check the calibration of the sound level meter with a sound calibrator
(2) Set the range switch to the appropriate gear according to the size of the measured sound. If the size cannot be estimated, set it to "85-130"
(3) Put the time weighting switch at the position specified by the standard; when the sound level is relatively stable, set it to "F" (fast); when the sound level changes drastically, set it to "S" (slow)
(4) Set the reading mark switch to "5S" or "3S"
(5) Set the power switch to "on"; the instrument will display a number when it starts to work
(6) If the right end of the display shows the excess mark "▲" (the underweight mark "▼"), the range switch should be moved up "or down" at this time to make the range mark disappear. If the range mark cannot disappear, the measured sound level at the time of the meter exceeds the measuring range of the instrument.
(7) After adjusting the range of the sound level meter, you can read the measurement results from the display.
(8) Make measurement records
(9) After the measurement, it is recommended to use the sound calibrator to check the sensitivity of the sound level meter to ensure the accuracy and reliability of the measurement data.
(10) Set the power switch to "Off". If the instrument will not be used for a long time, be sure to remove the battery.
