There are two types of sound pressure level such as without the frequency weighting (flat characteristic FLAT) sound pressure level (L_P) and with the frequency characteristic correction (C-Weighted) C-Weighted sound pressure level (L_C). In addition, sound pressure level has two measurement modes same as the sound level, such as displaying instantaneous value and displaying maximum value in a second.

 

1. Measurement procedure of sound pressure level (L_P)

Please follow the procedure below to measure the sound pressure level (LP).

 

◆Operation procedure

Set the measurement condition of this unit for the sound level measurement.

Display screen: Standard screen (Panel switch [LIST])

Frequency correction: FLAT (displaying P) (Panel switch [A/C/FLAT])

Dynamic characteristic: FAST or SLOW (Panel switch [F/S/IMP])

 

Set the measurement data display for sound pressure level (L_P) measurement.

Press the panel switch [L_P/L_eq…] to display the sound pressure level (L_P).

 

Set the measurement mode.

Press the panel switch [2nd] to switch the panel switch to secondary function.

Then press the panel switch [Tact Max] to set the instantaneous mode (INST) or maximum value display mode (TMAX 1) (maximum value in a second).

 

Read the measured value on the digital display.

 

 

 

2. Measurement procedure of C-Weighted sound pressure level (LC)

Please follow the procedure below to measure the C-weighted sound pressure level (LC).

 

◆Operation procedure

Please do not turn the volume forcibly or push it strongly. It may cause a failure.

 

Set the measurement condition of this unit for the sound level measurement.

Display screen: Standard screen (Panel switch [LIST])

Frequency correction: C (Panel switch [A/C/FLAT])

Dynamic characteristic: FAST or SLOW (Panel switch [F/S/IMP])

 

Set the measurement data display for sound pressure level (L_C) measurement.

Press the panel switch [L_P/L_eq…] to display the sound pressure level (L_C).

 

Set the measurement mode.

Press the panel switch [2nd] to switch the panel switch to secondary function

Then press the panel switch [Tact Max] to set the instantaneous mode (INST) or maximum value display mode (TMAX 1) (maximum value in a second).

 

Read the measured value on the digital display