Skip to content
soundlevelmeter.review

Rion · Environmental Noise Monitor · Noise monitoring station

Rion NA-39A

Current

Class 1 environmental noise monitor for permanent aircraft and environmental noise stations, with real-time 1/3-octave analysis, LAN and modem ports, GPS time synchronisation and an MS-11A outdoor microphone with built-in check source and optional heater. Separates airborne from ground sources and accepts secondary radar data for aircraft identification with the AS-51 software.

Specifications verified on .

Type
Noise monitoring station
Class
Class 1
Channels
1
Octave bands
1/3
Connectivity
LAN (10BASE-T/100BASE-TX), modem, GPS, weather meter connector, AC output
Weight
1500 g
Compare with other instrumentsAll noise monitoring stations

Specifications

As published by Rion. Fields the manufacturer does not publish are omitted rather than estimated.

Standards and class — Rion NA-39A
SpecificationValue
IEC 61672-1 classClass 1
StandardsIEC 61672-1:2013 class 1, IEC 61260:2014 class 1, JIS C 1509-1:2017 class 1, JIS C 1516:2020
Measurement — Rion NA-39A
SpecificationValue
Channels1
Measurement rangeA 28 to 138 dB; C 36 to 138 dB; Z 42 to 138 dB
Frequency range10 Hz to 20 kHz
Frequency weightingsA, C, Z
Time weightingsF, S, I
ParametersLp, Leq, Lmax, Lmin, Lpeak, event data, SSR data
Analysis — Rion NA-39A
SpecificationValue
Octave bands1/3
Octave band filter classclass 1 (IEC 61260:2014), real-time, standard
Reverberation timeNo
Building acousticsNo
Audio recordingYes
Logging and data — Rion NA-39A
SpecificationValue
Shortest logging interval100 ms
MemorySDHC card (8 GB supplied) plus 4 GB internal backup
Hardware — Rion NA-39A
SpecificationValue
MicrophoneOutdoor Microphone MS-11A, 1/2" electret, -28 dB, built-in check source, optional heater
Outdoor microphone kitMS-11A outdoor microphone with WS-13 all-weather windscreen (IPX3)
Weather sensorsYes
DisplayMonochrome backlit LCD, 64 x 128
Battery12 V sealed lead-acid backup (optional)
External power100 to 240 V AC; 9 to 15 V DC
Weight1500 g
Dimensions (mm)200 x 140 x 79 (main unit, excluding microphone and cables)
Operating temperature (°C)-10 to 50
Connectivity and software — Rion NA-39A
SpecificationValue
ConnectivityLAN (10BASE-T/100BASE-TX), modem, GPS, weather meter connector, AC output
Remote controlAircraft Noise Data Processing Software AS-51; NTP or GPS clock
SoftwareAS-51 Aircraft Noise Data Processing Software, NX-39WR Real Sound Recording Software

Where this data comes from

Manufacturer documents used for this record
KindDocumentAccessed
Product pageEnvironmental Noise Monitor NA-39A
DatasheetNA-39A Datasheet (print code 1708_4)

Verified on . Only the manufacturer’s own published material is used; distributor pages are not sources.

Spec out of date? Tell us (reference rion-na-39a).

Verified owner reviews

Reviews from people who own and use this instrument, each checked against a serial number by a person.

Opens in November 2026. Own this instrument? Register your interest.

Known issues and firmware notes

Hardware and firmware problems reported by owners, with the firmware version concerned and any manufacturer response.

Opens in November 2026. Own this instrument? Register your interest.

Feature requests

Functions owners would like to see in a firmware update or a successor model.

Opens in November 2026. Own this instrument? Register your interest.

Read next

More from Rion

Other class 1 noise monitoring stations