Integrating sound level meter
Class 1LA-4441
(Precision integrating sound level meter)
Class 2LA-1411/1441
(Integrating sound level meter)
New three models of integrating sound level meter LA-1411/1441(Class 2) and LA-4441 (Class 1) are applicable to IEC 61672-1:2013, JIS C 1509- 1:2017. The all models can perform simultaneous measurement of seven sound parameters including equivalent continuous sound level without adjusting the level range corresponding to the sound fluctuation and display the selected parameters.
The microphone is able to be used away from the main unit of sound level meter by using exclusive coaxial cable(s). Featuring curve-shaped body with minimum affects from sound reflection, easy-to-read and intuitive operating menu etc., our new sound level meters have greatly improved more than ever easier as ergonomically designed interface.
Moreover, LA-1441/4441 sound level meters can transfer the measurement result to a PC with simple and quick operation via RS-232C or USB interface. The sound level meter can be controlled remotely from PC using software (user preparation).
| LA-1411 | ●Integrating sound level meter (Class 2) for product testing
and measuring the sound level generated from machines etc. ●High-performance and cost-effective model |
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| LA-1441 | ●Integrating sound level meter (Class 2) for
measuring the working environment and environmental noise |
| LA-4441 | ●Precision integrating sound level meter
(Class 1) for sound analysis and product testing. |
Simultaneous measurements of seven sound items including equivalent continuous sound level (Leq) and displays of measurement results to be selected.
Essential seven sound items for sound measurement including equivalent continuous sound level (Leq) can be measured at the same time, and also displayed to be selected. The new LA series sound level meters greatly help the effective sound level measurement without any miss-measurement.
| • | Lp | time-weighted sound level |
| • | Leq | time-average sound level (equivalent continuous sound level) |
| • | LE | sound exposure level |
| • | Lmax | maximum time-weighted sound level |
| • | Lmin | minimum time-weighted sound level |
| • | Lpk | peak sound level |
| • | LＮ | percentile sound pressure level |
(Technical terms given here are based on IEC standards.) |
Microphone can be separated from the main unit of sound level meter by connecting several exclusive coaxial cable(s).
Microphone can be separated from the main unit of sound level meter by connecting several exclusive coaxial cable(s). It enables measurement of great distance away.
Simple and easy data processing
Connecting the main unit of sound
level meter with Windows-based PC via RS-232C or USB
cable, the new LA series can transfer the obtained
measurement data to the PC easily and quickly, also
can be operated and controlled remotely from PC with
a software (user preparation).
(Excluding LA-1411)
* LA-1411 is not able to be connected to USB and RS-232C.
| LA-1411 | LA-1441 | LA-4441 | |||||
|---|---|---|---|---|---|---|---|
| Applicable standard | IEC 61672-1 : 2013 Class 2 |
IEC 61672-1 : 2013 Class 1 | |||||
JIS C 1509-1 : 2017 Class 2 |
JIS C
1509-1 : 2017 Class 1 JIS C1516 : 2014 Class 1 |
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| Microphone | 1/2-inch backelectret-type |
1/2-inch backelectret-type |
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| Preamplifier | MI-3111 Preamplifier for mocrophone |
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| Linearity range | 100 dB (Wide range), 80 dB (Normal range) |
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| Measurable frequency range | 10 Hz to 8 kHz(IEC, JIS) |
10 Hz to 20 kHz(IEC, JIS) | |||||
| Measurement level range | A : 26 to 135 dB(IEC, JIS) |
A : 27 to 135 dB(IEC, JIS) C : 30 to 135 dB(IEC, JIS) Z : 35 to 135 dB(IEC, JIS) |
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| Frequency weighting | A，C，Z |
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| Intrinsic noise | A : 15 dB or less |
A : 16 dB or less |
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| Level range | 20 to 90 dB, 30 to 90 dB, 40 to 100 dB, 50
to 110 dB, 60 to 120 dB (Normal range), |
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| Time weighting | FAST, SLOW |
FAST, SLOW, Impulse, 10 ms | |||||
| Measurement items | Lp, Leq , LE, Lmax, Lmin, Lpk, LＮ(LHI, L5, L10, L50, L90, L95, LLO, LAV) | ||||||
| Level trend | Ｌp, every kind of calculated value | Lp,
every kind of calculated value |
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| Sampling interval | 31.25 μs (other than LN ) |
20.83 μs (other
than LN) 100 ms(LN) |
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| Measurement time | Manual, arbitrary setup (199 h 59 m 59 s max.) | ||||||
| Total measurement time | --- | Arbitrary setup (199 h 59 m 59 s max.) | |||||
| Start mode | Manual only | Manual, timer (Hour,minute), trigger (can be started after a lapse of specified time [0 to 10 seconds, in increment of 1 minute] after trigger detection: trigger delay function) | |||||
| Internal calibration signal (REFOUT) | 1 kHz sine wave (For upper limit level range : -6 dB(normal range), -16 dB(wide range)) | ||||||
| Recommended sound calibrator | SC-2500,SC-3120,SC-2120A | SC-2500,SC-3120 | |||||
| Display | LCD with LED backlight semitransparent (124 x 64-dot) Measurement value display by numeric and bar indicators List display and trend graph display for various kinds of calculated values Displays of date, time, measurement time, and conditions of various kinds of instruments |
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| Display update time | Display by numeric:1 s, bar indicator: 0.1 s, trend screen: 0.2 s | ||||||
| Manual memory function | Total calculated values: 100 addresses | ||||||
| Auto memory function | --- | Leq : 1000 addresses x 200 blocks Total calculated values: 100 addresses x 200 blocks |
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| Lp Record memory function | --- | Sound level with time weighting is stored at the
specified interval. (1000 address × 200 blocks) Storing intervals (1 ms, 2 ms, 5 ms and 10 ms) |
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| Measurement condition memory function | Condition memories (9 kinds) | ||||||
| Resume function | Settings activated at power ON can be selected from follows; settings used at previous power OFF, factory setting, and any condition memory number which is set from menu. | ||||||
| Backup function | The backup of data stored in clock and memory can be
performed by built-in secondary power source. • Time for full charged: approx. 24 hours • Backup period: more than 3 months (when stored at temperature of 23 °C) |
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| AC output *1 | 0.707 Vrms/F.S (normal range), 2.236 Vrms/F.S. (wide range),
load resistance 10 kΩ or more (with upper-limitation value of
bar indicator)
Frequency weighting can be selected: conjunction with selected frequency weighting or fixed to Z-weighting. |
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| DC output *1 | 2.5 V/F.S. (with upper-limitation value of bar indicator) Amount of voltage fluctuation per 10 dB: 0.25 V Load resistance: 10 kΩ or more |
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| External control input | --- | Operation: toggle operation of start/place in pause
Specifications of hardware: negative pulse input Pulse width: 100 ms or more |
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| Comparator function (Option: LA-0141) *2 | --- | Set comparison value : 40.0 to 130.0 dB (in increment of 0.1 dB) Comparison item : Lmax or Lpeak Delay time : 0 ms, 100 ms, 1 s, 5 s HOLD time : 100 ms, 1 s, 5 s, manual Output logic : negative or positive logic Output format : open collector (withstand voltage:+3 to +24 VDC, current:50 mA or less) |
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| Timer function | Built-in (year/month/day/hour/minute) | ||||||
| RS-232C | --- |
Control of operation, data output, print out (to the DPU-414 printer) Baud rate : 9,600/115,200 bps |
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| USB | --- |
Control of main unit and data output, USB 2.0 FULL SPEED (connecting virtual COM port) |
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| Cable extension *3
(Between microphone and main unit) |
305 m max. | 105 m max. | |||||
| Printer function | - |
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| Power requirement | Type AA battery × 2 pcs. (manganese (6R) or alkaline (LR6) or oxyride (ZR6)) or PB-7090 AC adapter (option)) |
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| Battery life (continuous using) | Approx. 8 hours (LR6 alkaline battery in use / 23 °C/ backlight off / not RS-232C･USB in use) | ||||||
| Operating (storage) temperature range | -10 to 50 °C (-20 to 60 °C) | ||||||
| Operating (storage) humidity range | 25 to 90 %RH (10 to 90 %RH) with no condensations | ||||||
| Outer dimensions | Approx. 78(W) × 263(H) × 47(D) mm | ||||||
| Weight |
Approx. 360 g (including batteries) | ||||||
| Accessories | Windscreen×1 (φ 70 mm), carrying case×1, hand strap×1, |
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| Option |
• LA-0141 Comparator output
option • SC-2500 Sound calibrator (Class1) • SC-3120 Sound calibrator (Class1/c) • SC-2120A Sound calibrator (Class2) • AG-2010 Microphone extension cable (10 m) • AG-2030 Microphone extension cable (30 m) • AG-2050 Microphone extension cable with code reel (50 m) • AG-2100 Microphone extension cable with code reel (100 m) • LA-0203D Tripod for sound level meter • PB-7090 AC adapter (120 to 240 VAC) • AX-501 Signal input-output cable (2 m) • AX-5022 RS-232C cable for PC (2 m) • DPU-414 Thermal printer for RS-232C ( AX-5024 RS-232C cable for printer (2 m) is supplied as standard) • PW-C0725-W2-U AC adapter (100 to 240 VAC) for DPU-414 (by SEIKO instruments) |
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LA-0141 Comparator output function |
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| Outline | This optional function outputs the signal when value exceeds the setting value. Useful for the determination of sound level under measurement. | ||||||||||||
| Specifications |
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SC-3120 Sound calibrator (Class 2)/ SC-2500 Sound calibrator (Class 1)/ SC-2120A Sound calibrator (Class 2) |
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| Outline | The SC-3120, SC-2500 and SC-2120A are sound calibrators which are indispensable for sound measurement, conforming to JIS C1515:2004 ( and SC-2500 / IEC 60942:2017). The SC-3120 is Class 1/C piston-phone type and outputted sound pressure at 250 Hz and 114 dB. The SC-2500 is Class 1 type sound calibrator with 1000 Hz and 114 dB output. It uses the sound pressure feedback control method to control fluctuations in sound pressure caused by static pressure to generate a stable sound pressure even if the operating environment changes. SC-3120 and SC-2500 are recommended sound calibrator for LA-1411/1441/4441. The SC-2120A is Class 2 speaker type sound calibrator with 1 kHz and 94 dB output. |
LA-0207A+LA-0208A All-weather windscreen |
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| Outline | Using the all-weather type windscreen reduces noise caused by the wind when performing sound level measurements outdoors, and prevents the microphone from being damaged by rain or snow.
Screen diameter:Φ 200 mm
Mounting screw:1/4-20 UNS depth 6(screw for tripod attachment) * Applicable to JIS C 1509-1:2005 and IEC 61672-1:2002 when the LA-0207A and LA-0208A are attached to the sound level meter. * Periodical exchange is necessary for the expendables (windscreen, waterproof mesh). |
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AG-2000 series Microphone Extension cable |
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| Outline | Microphone can be used away from main unit of sound
level meter by connecting exclusive coaxial extension
cable. Using exclusive coaxial cable enables measurement
of extension and moving the measurement place easier
with small-type code reel. |
| Others | ・ MI-0301 Microphone holder is a
standard accessory of each extension cable.
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AX-501 Output cable |
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| Outline | Output cable for AC / DC signal output, comparator
output, and external control signal input. It is used
for the connection to FFT Analyzer, data recorder, PC,
and sequencer etc.(2 m) |
AX-5022 RS-232C cable |
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| Outline | IF cable for connecting the LA-1441/4441 and PC (RS-232C connector). (2m) |
LA-0203D Tripod for sound level meter |
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| Outline |
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PB-7090 AC Adapter |
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| Outline |
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DPU-414 Thermal Printer with RS-232C interface |
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| Outline |
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Revised:2018/10/18
