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Sound Level Meter
LA-1441A/LA-1411/LA-4441A

LA-1411
LA-1441A
LA-4441A
LA-4441A
LA-4441A
LA-4441A

The integral average sound level meters (sound level meters) "LA-1411/LA-1441A (Class 2, ordinary sound level meter)" and "LA-4441A (Class 1, precision sound level meter)" are compliant with the Measurement Act (enforced in 2021), IEC 61672-1:2013, and JIS C 1509-1:2017.※1
With a wide linearity range of 100 dB, it can simultaneously measure and display seven noise indicators, including the time-averaged sound level, in response to a wide range of sound level fluctuations without switching the level range.
The three products allow for the separation of the microphone part of the sound level meter from the main unit, enabling long-distance extension of the microphone part by connecting a dedicated coaxial cable.

The curved body shape minimizes the effects of sound reflection, and the intuitive operation menu is easy to read, achieving a more user-friendly human interface than ever before.

Additionally, the LA-1441A and LA-4441A sound level meters (noise meters) can quickly and easily transfer acquired measurement data to a computer via RS-232C or USB using dedicated free software, and can also be remotely operated and controlled from a computer.

* ASNITE calibration and JCSS calibration are possible.
(※1) From the shipments in December 2017, the compliance standards listed on the back of the main unit have been switched to IEC 61672-1:2013 and JIS C 1509-1:2017. It has been confirmed that shipments before November 2017 are also compliant with IEC 61672-1:2013 and JIS C 1509-1:2017. Customers who purchased before November 2017 and wish to update the JIS/IEC notation during calibration (for a fee) should contact our customer service.

LA-1411
Class 2 (ordinary sound level meter)
  • Sound level meter for measuring machine noise levels and for product inspection.
  • Low price, high cost performance model
LA-1441A
Class 2 (ordinary sound level meter)
  • Work environment, environment sound level meter Sound level meter for measurement
  • Equipped with an automatic measurement function using a timer and trigger.
  • Level trend recording is possible from a save interval of 1 ms (L p record function)
  • Equipped with USB and RS-232C interfaces.
LA-4441A
Class 1 (precision sound level meter)
  • Sound level meter for noise analysis and product inspection.
  • Equipped with IMPULSE's time weighting characteristics, responding to fast level fluctuation sounds in 10 ms.
  • Level trend recording is possible from a save interval of 1 ms (L p record function)
  • Equipped with USB and RS-232C interfaces.

Features

Simultaneously measures and displays seven noise indices, including time-averaged sound level (Leq).

Equipped with the essential time-averaged sound level (Leq) measurement function for sound level meters,
simultaneously measures 7 noise indicators (L p, L eq, L E, L max, L min, L peak, L N＜L high, L 5, L 10, L 50, L 90, L 95, L low, L ave＞), allows for selection display, and prevents measurement omissions.

L p Time-weighted sound level
L eq Time Average Sound Level
L E Sound exposure level
L max maximum value of time-weighted sound level
L min minimum value of time-weighted sound level
L peak Peak Sound Level
L N time rate sound level

The microphone part of the sound level meter can be separated from the main body and extended over long distances using a dedicated coaxial cable.

The microphone part of the sound level meter can be separated from the main body and extended over long distances using a dedicated coaxial cable. This makes remote measurements easy to achieve.

Easy and convenient data processing

Connect the sound level meter to a Windows ® PC using an RS-232C or USB cable, and use the dedicated free software to quickly and easily transfer the acquired measurement data to the computer, or to remotely operate and control the sound level meter from the computer.
(Excluding LA-1411)

  • Easy and convenient data processing

System Configurations

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AX-501 AG-2000 AG-2000

Specifications

Product Specifications

  LA-1411 LA-1441A LA-4441A
Applicable Standards JIS C 1509-1:2017 (Class 2)
JIS C 1516:2020 (Class 2)		 JIS C 1509-1:2017 (Class 1)
JIS C 1516:2020 (Class 1)
IEC 61672-1:2013 Class 2 IEC 61672-1:2013 Class 1
Model Approval Number
Measurement Law (Enforced in 2021)		 TS223 TF226
Microphone 1/2 inch back electret
condenser microphone MI-1433
Nominal sensitivity level: −29 dB		 1/2 inch back electret
condenser microphone MI-1235
Nominal sensitivity level: −29 dB
preamplifier Microphone Preamplifier MI-3111
Linear motion range
(Linearity range)		 100 dB (wide range), 80 dB (normal range)
Measurement Frequency Range 10 Hz to 8 kHz (JIS, IEC) 10 Hz to 20 kHz (JIS, IEC)
Full range of straight line motion A characteristic: 26 dB to 135 dB (JIS, IEC)
C characteristic: 31 dB to 135 dB (JIS, IEC)
Z characteristic: 36 dB to 135 dB (JIS, IEC)		 A characteristic: 27 dB to 135 dB (JIS, IEC)
C characteristic: 30 dB to 135 dB (JIS, IEC)
Z characteristic: 35 dB to 135 dB (JIS, IEC)
Frequency weighting characteristic A, C, Z
self-noise A characteristic: below 20 dB
C characteristic: below 25 dB
Z characteristic: below 30 dB		 A characteristic: below 19 dB
C characteristic: below 22 dB
Z characteristic: below 27 dB
level range 20 to 90 dB, 30 to 90 dB, 40 to 100 dB, 50 to 110 dB, 60 to 120 dB, 70 to 130 dB (normal range) /
40 to 120 dB (wide range)
Time weighting characteristic FAST,
SLOW		 FAST,
SLOW,
Impulse,
10 ms
Measurement items L p, L eq, L E, L max, L min, L peak, L N (L high, L 5, L 10, L 50, L 90, L 95, L low, L ave)
Level Trend L p, various calculated values L p, various calculated values
(readable display values in auto memory recall)
sampling period 31.25 μs (except L N)
100ms (L N)		 20.83 μs (except L N)
100ms (L N)
measurement time Manual, arbitrary setting (199 h 59 m 59 s max)
total measurement time --- Arbitrary setting (199 h 59 m 59 s max)
Start Mode Manual Manual, Timer (00 h:00 m: 1 min unit),
Trigger
(Start possible after any time (0 to 10 s, 1 s unit) has elapsed after trigger detection (Trigger delay function))
Internal Reference Signal (REF OUT) 1 kHz sine wave (against the level range upper limit, -6 dB for normal range, -16 dB for wide range)
Recommended audio calibration device SC-2600, SC-2500A, SC-2120A SC-2600, SC-2500A
Display LCD with LED backlight, half-transmissive 124 x 64 dot matrix
Measurement display with numerical and bar indicators,
List display of various calculated values and trend graph display,
Date and time, measurement duration, and status display of various devices
Display update time Numeric display: 1 s, Bar indicator: 0.1 s, Trend screen: 0.2 s
Manual memory function Total calculation value: 100 data sets
Auto Memory Function --- L eq: 1000 data × 200 blocks,
total operation values: 100 data sets × 200 blocks
L p record
Memory function		 --- Time-weighted sound level (Lp) saved at specified time intervals
(1000 data × 200 blocks)
Select from save intervals (1 ms, 2 ms, 5 ms, 10 ms)
Measurement Condition Memory Function Condition Memory (9 pieces)
resume function The power-on settings can be configured to either the last shutdown state, factory default, or
the specified condition memory number.
backup function

The built-in secondary battery allows for the backup of data stored in the clock and memory.

  • Charging time until fully charged is approximately 24 hours.
  • Backup period: more than 3 months (provided that it is stored at 23 degrees Celsius)
AC output ※1 At the upper limit of the bar indicator:
0.707 Vrms/F.S (normal range),
2.236 Vrms/F.S (wide range),
load resistance of 10 kΩ or more
*Frequency weighting can be selected from setting linkage and fixed Z characteristics.
DC output ※1 At the upper limit of the bar indicator: 2.5 V/F.S,
voltage change per 10 dB: 0.25 V,
load resistance of 10 kΩ or more
External control input --- Operation: Start/Pause toggle operation
Hard specifications: Negative logic pulse input
(Voltage level: Low: 0.0 to 0.5 V, Hi: 3.0 to 5.0 V),
Pulse width: 100 ms or more, absolute maximum rated input voltage: 5 V
Comparator function
(Option: LA-0141) ※2		 --- Setting comparison value: 40.0 to 130.0 dB (0.1 dB unit)
Comparison items: L max or L peak
Delay time: 0 ms, 100 ms, 1 s, 5 s
HOLD time: 100 ms, 1 s, 5 s, manual
Output logic: negative logic or positive logic
Output format: open collector type
(Applicable voltage: DC +3 to +24 V, current below 50 mA)
clock function Internal (Year/Month/Day Hour:Minute)
RS-232C --- Control of the main unit and data output, output to printer (DPU-414)
Transfer speed: 9,600/115,200 bps
USB --- Control of the main unit and data output,
USB 2.0 FULL SPEED (virtual COM port connection) ※ 6
Cable extension ※3
(between microphone and main unit)		 MAX. 305 m MAX. 105 m
printer function --- Content: Measurement values, measurement start/end times, actual measurement time, frequency weighting characteristics, time weighting characteristics
Mode: Normal (alphanumeric) or screen image, compatible printer: DPU-414
Power Supply Two AA batteries
or PB-7090 AC adapter (optional)
Battery life
(continuous use)		 Approximately 8 hours
(using LR6 alkaline batteries, at 23°C/when backlight is off/when RS-232C and USB are not in use)
Operating (Storage) Temperature Range -10 to 50ºC (-20 to 60ºC)
Use (Save) Humidity Range 25 to 90% RH (10 to 90% RH) (non-condensing)
Size Approximately 78 (W) × 263 (H) × 47 (D) mm
Mass
(including batteries)		 Approximately 360 g (including battery)
Accessories Windshield (⌀ 70 mm), carrying case, hand strap, batteries, instruction manual CD ※7, quick operation guide
Price
(including tax)		      
Shipping inspection fee
(including tax) ※4		    
Option
  • LA-0141 コンパレーター出力オプション：
  • SC-2600 音響校正器（クラス 1）：
  • SC-2500A 音響校正器（クラス 1）：
  • SC-2120A 音響校正器（クラス 2）：
  • AG-2010 マイクロホン延長ケーブル(10 m)：
  • AG-2030 マイクロホン延長ケーブル(30 m)：
  • AG-2050 同上コードリール付き(50 m)：
  • AG-2100A 同上コードリール付き(100 m)：
  • PB-7090 ACアダプター(AC 100～240 V) ※5：
  • AX-501 信号入出力ケーブル(2 m)：
  • AX-5022B RS-232C ケーブル(2 m)：

*1 To switch between AC output and DC output, select one from the menu in sound level meter.
*2 The comparator function (option: LA-0141) cannot be installed on the LA-1411.
*3 The cable extension distances listed here refer to the dedicated cables sold by our company. Also, CE marking compliance is limited to distances under 30 m.
*4 As a general rule, our company replaces the inspection conducted at the time of shipment with a "Standard Conformity Certificate" through voluntary inspection.
After shipment, products undergo inspection and adjustment at our company, and then we request certification from the Japan Quality Assurance Organization (JQA).
Also, since our standard is products without certification, customers who wish to have products with certification (standard conformity stamp) or who wish to have them certified by a public institution from the time of shipment should inform us when placing their order.
*5 The included AC cord is for domestic Japanese specifications. If you are using it with overseas specifications (AC 120~240 V), please specify the compatible AC code separately.
*6 For sample programs & utilities, please refer to the Free Utility Program Download.
*7 The LA-1411 comes with an instruction manual and a simplified operation guide (instruction CD is not included).

Accessories

  • List of Accessories Diagram
    List of Accessories Diagram
  • included carrying case
    included carrying case

Options

LA-0141 Comparator Output Option
Overview This is an option to output a signal when the set value is exceeded. It can be used for determining the sound level of the measurement target.
Specifications
Comparison value for settings 40.0 to 130.0 dB (in increments of 0.1 dB)
comparison target items L max or L peak
delay time 0 ms, 100 ms, 1 s, 5 s
(This is effective only when you want to determine only when the set value is exceeded continuously. It can avoid false detections caused by single noise, etc. Note that if the HOLD setting is manual, it will be disabled.)
HOLD time Duration: 100 ms, 1 s, 5 s, manual
(This is the time to maintain output even if the input falls below the set value. In manual mode, it will be held until the next measurement starts.)
Output Logic Negative logic or positive logic
output format Open collector type (permissible voltage: DC +3 to +24 V, current 50 mA or less)
Price (including tax)  
Recommended Sound Calibrators (SC-2600, SC-2500A / SC-2120A)
Overview This is an essential acoustic calibration device for sound level meters. It complies with JIS C1515/IEC 60942.
Learn more
SC-2600 SC-2500A SC-2120A
SC-2600 SC-2500A SC-2120A
Price
  • SC-2600 音響校正器（クラス1）：  
  • SC-2500A 音響校正器（クラス1）：  
  • SC-2120A 簡易音響校正器（クラス2）：  

LA-0207A + LA-0208A All-Weather Windscreen
Overview
By using an all-weather windscreen, you can reduce noise from the wind during outdoor noise measurements and prevent damage to the microphone from rain or snow.

Screen diameter: ⌀ 200 mm
Mounting screw section: 1/4-20 UNS depth 6 (for camera tripod screws)

*When LA-0207A and LA-0208A are attached,
it complies with JIS C 1509-1:2017/ IEC 61672-1:2013
*Consumable parts (windscreen, waterproof mesh) need to be replaced regularly.

LA-0207A + LA-0208A All-Weather Windscreen
Price
  • All-Weather Windproof Screen
     
  • LA-0208A dedicated adapter for AG-2000:
     

AG-2000 Series Microphone Extension Cable
Overview You can disconnect the microphone section from the main unit and use a dedicated microphone extension cable for long-distance extension.
Multi-core cables tend to be heavy, but the dedicated microphone extension cable is coaxial, so even with a 100 m extension, the cable reel can be compact, making it easier to move on site.

AG-2000 Series Microphone Extension Cable
Price
  • AG-2010 Microphone Extension Cable (10 m):
     
  • AG-2030 Microphone Extension Cable (30 m):
     
  • AG-2050 Same as above with cord reel (50 m):
     
  • AG-2100A same as above with cord reel (100 m):
     
  • It comes with a microphone holder.
  • The extension cable with a code reel comes with a relay cable (5 m) that connects to the main body of the sound level meter.
  • You can connect multiple extension cables to make them longer.

AX-501 output cable
Overview For AC/DC signal output, comparator output, and external control signal input.
It is used when connecting to FFT analyzers, data recorders, computers, sequencers, etc. (2 m)

AX-501 output cable
Price  

AX-5022B RS-232C Cable
Overview This is an IF cable that connects the product to a PC (RS-232C connector).
It is used when connecting to a computer. (2 m)

AX-5022B RS-232C Cable
Price  

tripod for sound level meter
Overview This is a standard tripod for a sound level meter. (Slik brand Airy L100)
tripod for sound level meter

PB-7090 AC adapter
Overview
Input voltage: AC 100–240 V, 50/60 Hz
Output voltage: DC 5.9 V
Output connector: EIAJ RC-5320A voltage category 2
Rated output current: 3.5 A
Total length: 3.5 m
*The included AC cord is for domestic use in Japan. If using for overseas specifications (AC 120–240 V), please specify a compatible AC cord separately.		 PB-7090 AC adapter
Price  

Calibration

To ensure the accuracy of the values measured by the measuring instrument, it is necessary to calibrate the instrument at appropriate intervals. Only by using calibrated instruments can the reliability and stability of the obtained measurement values be enhanced. The integrated average sound level meter has three calibration services: "ASNITE calibration," "JCSS calibration," and "general calibration."

Inquire about this product.

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Product Brochures

Outline Drawings

Instruction Manuals

最終更新日:2026/1/14