| Function |
Guideline / Application |
SM30 |
| Modules / Functions |
| Sound Pressure Level Meter (SPL / SLM) IEC-61672-1 : 2014, ANSI S1.4 |
|
Class 2 / Type 2 |
| Frequency Weighting |
Choose frequency method |
A ,C, Z (A : weighted, C : weighted , Z : Unweighted) |
| Time Weighting |
Choose based on time frames |
FAST , Slow, Impulse |
| Equivalent continuous (EQ) |
|
Computes the time-integrated level over the
measurement interval |
| Sound Exposure level (SEL) |
|
Time-integrated value normalized to 1 sec |
| Peak Value |
|
Highest instantaneous value within an interval |
| Max Hold |
Lock on highest values measured |
Maximum level during the measurement
interval; Used with Fast, Slow or Impulse time weighting |
| Measurement Time |
Set duration of measurement |
Set Measurement Time or Continuous (for infinite) |
| LEQ Long-term logging/monitoring (LAEQ) |
Monitoring of continuous environmental noise / logging of sound levels, e.g. LAeq15min |
Track equivalent continuous sound pressure level (LEQ) develop over time with simultaneous logging of A/C/Z |
| Real Time Analyzer (RTA) |
Frequency Analysis for separate frequency bands |
Frequency analysis in range 20 Hz to 20 KHz for frequency bands 1/1, 1/3, 1/6 or 1/2 octaves. Two spectral views present- frequency weighting or time weighting |
| Fast Fourier Transform Analyzer (FFT) |
Perform spectral analysis with higher frequency resolution |
Up to 32768 data points, with Zoom In/Out feature, Spectral analysis for identifying exact frequency and level of signal components and study of harmonic structure of sound |
| L%, Statistical acoustics |
Acoustic statistics based on threshold expressed as percentile, e.g. L10 to L95 can be measured |
Simultaneous measurement and display of six different settings |
| RTA Logging |
Long term monitoring of special characteristics of sounds |
Spectrograms, with averaging window between 1 to 999 seconds of spectrum in 1/1, 1/2, 1/6 or 1/12 octave as well as A, C , Z weighted equivalent continuous levels |
| Acoustics |
| Electro-Acoustics & Electric Analysis |
|
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|
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| Digital Storage Oscilloscope |
Inspect acoustic signals, in particular periodic signals, in time domain |
Yes, up to 20kHz |
| Polarity |
Check polarity of loudspeakers |
Yes, Use test signals provided or use with BTB65 Talkbox |
| AC Volt Meter for Line Level Signals |
Assess Output level |
Yes, Measure Vrms, dBU, dBV |
| Total Harmonic Distortion & Noise (THD+N ) |
Quantify distortion levels in electro-acoustic equipment. |
Value THD+N is expressed as a percentage (%) or a signal-to-noise ratio (dB) |
| Fundamental Frequency Estimation |
|
Yes, Measurement in Hz with pitch & offset |
| Building / Structural Acoustics |
|
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| Sound Insulation: |
Evaluate airborne sound transmission loss |
4 different frequency dependent measures : D, Dn, DnT, R |
| Sound Reduction Index; Sound Transm. Class (SRI / STC ) |
For specifying and measuring sound insulation |
4 metrics R'w ; Dn,w ; DnT,w ; STC |
| Room Acoustics |
|
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| Reverberation Time (RT60) |
Measure sound energy decay |
Full Octave and 1/3rd octave measurements are supported. As per ISO-3382, Suggested to be used with BTB65 Talkbox |
| Noise Curves |
Choose method based on standard. |
NR, NC, PNC, NCB, RC, RCII |
| Acoustic Specifications |
| Linear Range, Electric Input (dBuV) |
|
21 ~132dB |
| Measurement Range (dB) , Linear Range with Supplied Microphone, dBA SPL |
|
30 ~122dB |
| Frequency Range (Hz) |
Covers entire range heard by human ear |
20 ~20.000 |
| Accuracy (dB) |
|
0.5 |
| Resolution (dB) |
|
0.1 |
| Octave Filter |
|
Class 1 1/1, 1/3, 1/6 and 1/12 octave filters |
| |
31.5 Hz, 63 Hz, 125 Hz, 250 Hz, 500 Hz, 1 kHz, 2 kHz, 4 kHz, 8 kHz, 16 kHz |
| Analysis Rate |
|
93.5 times/sec |
| Sampling Frequency (kHz) |
|
48 |
| Input |
| Add Text Annotations to Measurements |
Yes |
| Capability to Record Audio of all Measurements |
Yes, in .wav format |
| Calibration |
| Automatic Level Calibration Procedure |
|
Yes |
| Calibrated Recording of Audio on Internal Memory |
|
Yes |
| Real-time Calibrated USB Audio Device Mode |
|
Yes |
| Declaration of Conformity |
|
Declaration of conformity provided with individual Calibration certificate |
| External Calibrator |
|
Optionally available |
| Physical |
| Display |
|
Full-color 3.2” resistive LCD touchscreen display |
| Microphone Connector |
|
XLR 48V |
| Microphone Provided with Instrument |
|
Class 2 electret microphone & preamp (1/4”), 30 mV/Pa sensitivity |
| Data Storage for measurement data and audio (GB) |
|
4 |
| Remote Control from PC via USB (either through Serial Commands or Cloning of the Display) |
|
Yes |
| Data Output |
|
To PC, files can be saved as .csv for data viewing in spreadsheets ; audio recordings also saved in .csv files |
| Battery |
|
Rechargeable Internal Battery, 2500 mAh |
| Capability to Connect to External Power Supply |
For long duration continuous measurement |
Yes, instrument can connect via USB port to power banks or charger |
| Internal Real-time Clock and Calendar |
|
Yes |
| Size/Weight |
|
210 x 85 x 55 mm( excl. microphone); 530 g ( including microphone) |
| Temperature/ Relative Humidity |
|
-10 to +55 ⁰C; 0-95% |
| Colors |
|
Blue and black |
| Supply will include |
|
Microphone (Class1 for SM90 / Class2 for SM50 AND SM30), USB charger, Intl. Charger adapters, measuring instrument, cables, windscreen, manual, carrying cord, USB flash drive with test signals & software tools in a ruggedized waterproof carrying case |
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