Total Measurement range

Class1: 18 dB(A)〜144 dB(A); 30 dB(C)〜144 dB (C); 40 dB(Z)〜144 dB (Z)

Class2: 25 dB(A)〜144 dB(A); 35 dB(C)〜144 dB (C); 45 dB(Z)〜144 dB (Z)

Internal noise

Class1: < 13 dBA Leq; 20dBC Leq; <27dB(Z) Leq

Class2: < 18 dBA Leq; 25dBC Leq; <30dB(Z) Leq

microphone and preamplifier sensitivity

-36 dB Note: Sensitivity is referenced at 0 dB with 1V/Pa. Unless otherwise specified below, all references to sensitivity pertain to the standard configuration.

Frequency range

Class 1: 10 Hz～20 kHz Class 2: 20 Hz～12.5 kHz

Weighting filters

Parallel A, C, Z weighting

Time constants

Parallel F (fast), S (slow), I (impulse)

Exchange rates

3, 4, 5, 6

Total value integration

Peak C Sound Level Measurement Range: 60 dB~146 dB Main Measurement Indicators: Lxyi, Lxyp, Lxeq,t, Lxeq,T, Lxmax, Lxmin, Lxpeak, LAE, LC-A, SEL Note: x represents A, C, Z; y represents F, S, I

Statistics

Number of Modules: 2. Analysis Mode: Single or 24hours option. Statistical Analysis Indicators: Lxyi, Lxyp, Lxeq,T, Lxmax, Lxmin, LxN, SD, SEL. 24h Mode Analysis Indicators: Lxyi, Lxyp, Lxeq,T, Lxmax, Lxmin, LxN, SD, SEL, Ld, Ln, Ldn, etc. Note 1: x represents A, C, Z; y represents F, S, I; N represents 5, 10, 50, 90, 95 Note 2: When Ln is activated, 7 additional statistical indicators are added

Measurement Time

1 second to 24 hours

1/1 octave

Filter Type: Parallel (real-time) octave, G=103/10. Complies with Standards: Filter Center Frequencies: --Class 1: 16 Hz, 31.5 Hz, 63 Hz, 125 Hz, 250 Hz, 500 Hz, 1 kHz, 2 kHz, 4 kHz, 8 kHz, 16 kHz. --Class 2: 31.5 Hz, 63 Hz, 125 Hz, 250 Hz, 500 Hz, 1 kHz, 2 kHz, 4 kHz, 8 kHz Time Weighting: Fast (F) and Slow (S). Real-time Analysis: Parallel computation of all center frequencies with A, C, Z weightings. Dynamic Range: Greater than 100 dB (Z). Main Measurement Indicators: Instantaneous Sound Pressure Level (Lp) in bands, Maximum (Max), Minimum (Min), and Equivalent Continuous Sound Pressure Level (Leq,T), Noise Rating (NR).

1/3 octave

Filter Type: Parallel (real-time) one-third octave, G=103/10. Complies with Standards: Filter Center Frequencies: --Class 1: From 12.5 Hz up to 25 kHz. --Class 2: From 20 Hz up to 12.5 kHz. Time Weighting: Fast (F) and Slow (S). Real-time Analysis: Parallel computation of all center frequencies with A, C, Z weightings, including custom frequency weightings. Dynamic Range: Greater than 100 dB (Z). Main Measurement Indicators: Instantaneous Sound Pressure Level (Lp) in bands, Maximum (Max), Minimum (Min), and Equivalent Continuous Sound Pressure Level (Leq,T).

FFT

Pre-FFT Weighting: A, C, Z weightings. Time Weighting: Fast (F) and Slow (S), optional. FFT Analysis Lines: 2048 lines. Analysis Frequency Upper Limit: --Class 1: 28640 Hz、14320 Hz、7160 Hz、3580 Hz、1790 Hz. --Class 2: 14320 Hz、7160 Hz、3580 Hz、1790 Hz、895 Hz. Bandwidth per Line Bp: --Class 1: From 32 Hz down to 2 Hz. --Class 2: From 16 Hz down to 1 Hz. Window Functions: Flat-top, Bruhn, Hanning, and Tectangular windows selectable. Measurement Indicators: Fast time-weighted instantaneous values under each spectrum line, slow time-weighted instantaneous values, maximum and minimum sound pressure levels (Max/Min) under the spectrum line, and equivalent continuous sound pressure level (Leq,T), with measurement duration (Tm).

Reverberation time(RT60)

Optional

STIPA

N/A

Audio recording

Saved in to TF card

Voice comments

N/A