PRODUCTS
- Acoustic related products
- Sound level meter
Sound Level Meter
TYPE 6236/6238
On-site measurement of environmental noise is strongly expected to have high resolution and real-time analyzing function on the spot. Moreover, in the field of product development such as car parts electric appliances, etc., it is required to measure and analyze the sound of ultra-low level more accurately, corresponding to the rise of consciousness that the acoustic characteristics such as silence, tone quality, etc., should be the part of the product, which is deeply related to our human hearing sensation.
The function of TYPE 6236/TYPE 6238 can be extended quite easily to those such as measurement of various parameters for environmental noise, only by inserting option FFT Analysis Card into the card slot. Also, this equipment is provided with newly developed “0-dB function” for measuring ultra-low sound pressure level, symbolizing the next-generation sound level meter with extremely high resolution and reliability.
World first!! “0-dB function”
By employing the original DSP technology, which eliminates the self-noise of the microphone with preamplifier, the lower limit of measurement has been drastically extended to lower than 0 dB-SPL. Linearity range, extended to 100 dB in the usual state, further expands to that corresponding to the measurement range 0～80dB(A) by holding the 0-dB function in ON position.
It enables to measure ultra-low sound pressure level, so displaying its greatest power as in the quietness measurement of, or tone quality evaluation of, various silent-type IT/OA equipments, as well as in the measurement of air-conditioning noise or sound isolation in a concert hall with ambient noise below NC-20.
※Technology relating to “0-dB function” is the fruit of joint research work with Shizuoka University.
Function Enhancement －Program card (SD card)－
Replacing the card with SD card enables to add the specified analyzing function to TYPE 6236/TYPE 6238.
－1/1 and 1/3-octave Real-time analysis card
－FTT analysis Card *option
－RSR card (Real Sound Recording Card) *option
Equipped with a function of displaying NC bar graph with evaluated NC index
In response to your great deal of needs, the function of displaying NC-bar with evaluated NC index finally equipped!!
By inserting "1/1 and 1/3-octave Real-time Analysis Card" in TYPE 6236/TYPE 6238, evaluated NC index is displayed in real time, empowering the evaluation of on-site noise measurement.
Embedded high precision microphone
TYPE 6236/TYPE 6238 is equipped with high precision electret condenser microphone(TYPE 7052NR/TYPE 7146NR) which ACO is most proud of.
The measurement frequency range covers entire audible frequencies,TYPE6236:20Hz～20kHz,TYPE6238:5Hz～20kHz.
ACO Microphone is made as one with highly anti-shock capability
"Microphone has a image of breakable object needing frequent replacement"
Such an image is broken down by ACO microphone of highly anti-shock capability,developed through lengthy research and development work.
ACO Microphones,clearing various strength tests,delivers the customers from very delicate handling of the microphone,offering the environment focused on sound measurement.
2.Memory Card(SD Card)
3.1/1 and 1/3-octave Real-time Analysis Card
4.BNC pin cord(※only TYPE 6238)
5.Windscreen
6.Batteries
7.Strap
8.Instruction Manual(CD)
9.Carrying Case
A-weighted sound pressure level is measured when time weighting is [Fast] or [Slow], and Frequency weighting [A]. The instantaneous A-weighted sound pressure level is displayed on the liquid crystal screen. Displayed digital data is updated in each second, as well as bar graph in each 0.1 second.
Sound Pressure Level(LC/Lp)
Sound pressure level is measured when time weighting is [Fast] or [Slow], and Frequency weighting [C] or [Z]. The instantaneous Sound pressure level is displayed on the liquid crystal screen. Displayed digital data is updated in each second, as well as bar graph in each 0.1 second.
Equivalent continuous A-weighted sound pressure level (LAeq)
Set the Time weighting to ｢Fast or Slow｣, and the frequency weighting to [Ａ]. Measurement time is selected from 1sec/3sec/5sec/10sec//1min/5min/10min/15min/30min/1h/8h/12h/24h. Moreover the manual measurement is available. Data in past 3 sec or 5 sec could be deleted when [Pause] key is pressed during the measurement. The process of LAeq calculation is displayed on the liquid crystal screen.
Percentile level(LN)
By pressing ｢Start｣Key, the percentile level （Lmax,L05、L10、L50、L90、L95、Lmin）, the Sound exposure level(LAe), A-weighted Sound pressure level(LA) and Equivalent continuous A-weighted sound pressure level(LAeq) can simultaneously be measured.
Additional index
・Peak sound pressure level(Lpeak)
・C-weighted peak sound level(LCpeak)
・C-weighted equivalent continuous sound level(Lceq)
・Power average of maximum sound level in a given interval(Latm5)
・Impulse sound level(LAI)
・Impulse equivalent continuous sound level(LAIeq)
| Product Name | Price |
|---|---|
| Sound Level Meter TYPE 6236 (With 1/1 and 1/3-octave Real-time Analysis Card NA-0038) | JPY200,000 |
| Precision Sound Level Meter TYPE 6238 (With 1/1 and 1/3-octave Real-time Analysis Card NA-0038) | JPY300,000 |
| Product Name | Price |
|---|---|
| 0-dB function | JPY20,000 |
| FFT Analysis Card NA-0038F | JPY100,000 |
| RSR Card NA-0038R | JPY100,000 |
| Type | TYPE 6236 | TYPE 6238 |
|---|---|---|
| Type approval number | SLS101 | SLF101 |
| Name | Sound Level Meter | Precision Sound Level Meter |
| Applicable Standards | JIS C1509-1:2005 ClassⅡ IEC 61672-1:2002 ClassⅡ | JIS C1509-1:2005 classI IEC 61672-1:2002 ClassI |
| Frequency Range | 20Hz～20kHz (Conforms with measurement law 20Hz～8kHz) | 5Hz～20kHz (Conforms with measurement law 20Hz～12.5kHz) |
| Microphone Type （Sensitivity） | TYPE 7052NR (-33dB,Stand-alone -31dB) | TYPE 7146NR (-29dB,Stand-alone -27dB) |
| Measurement Level | A:28～130dB (0～80dB/0-dB function in ON) C:36～130dB Z(FLAT):40～130dB C peak:55～141dB Z(FLAT)peak:60～141dB | A:28～130dB (0～80dB/0-dB function in ON) C:37～130dB Z(FLAT):39～130dB C peak:55～135dB Z(FLAT)peak:60～135dB |
| Self-noise level | The lower limit of the measurement range in dB lies 6dB higher than self-noise level. | The lower limit of the measurement range in dB lies 8dB higher than self-noise level. |
| Level Range Control | 10dB 6step 20～80dB、20～90dB、20～100dB 20～110dB、30～120dB、40～130dB (0～80dB／0-dB function in ON) |
|
| Linearity Range | 100dB | |
| Time weighting | Fast、Slow、Impulse | |
| Frequency weighting | A、C、Z(FLAT) | |
| Measurement items | Sound pressure level(Lp) A-weighted sound pressure level(LA) C-weighted sound pressure level(LC) Equivalent continuous A-weighted sound pressure level(LAeq) Sound Exposure level(LAE) Maximum sound pressure level(LAmax) Minimum sound pressure level(LAmin) Percentile sound pressure level(5 freely selectable values、LAN) Peak Sound Pressure level(Lpeak) C- weighted Peak Sound Pressure level(LCpeak) Power average of maximum sound pressure level in a given interval(LAtm5) Impulse Sound pressure level(LAI) Impulse equivalent continuous sound pressure level(LAIeq) |
|
| Measurement time | 1s/3s/5s/10s/1min/5min/10min/15min/30min/1h/8h/12h/24h Manual(Max. 199h59m59s) |
|
| Sampling Time | 20.8μs(Leq、Lmax、Lmin)、100ms(LN) | |
| Data clear Function | Pause, and a function that deletes preceding 3 or 5 sec. Memory start；Selectable Auto or Manual |
|
| Timer function | A marker can be set to start and stop the measurement at any specified moments. | |
| Display | Liquid crystal and Backlight(128×64 points) | |
| Digital display | Display range:4digit display Display cycle：display Period: 1s |
|
| Bar display | Display Period:0.1s | |
| Warning | Over；+3dB from upper limited scale Under；－0.6dB from lower limited scale |
|
| Battery display | Battery 5 steｐs display | |
| Date | year/month/day/hour：minute：second | |
| Pause | Normal pause function, as well as the function of canceling the data before pausing the measurement, are available. | |
| Calibration signal | Electric calibration with internal oscillator (1kHz sine wave) | |
| AC Output | φ2.5Jack Output：1Vrms(FS) Output impedance：600Ω Load impedance：more than 10kΩ |
|
| DC Output | φ2.5Jack Output：2.5V(FS) 0.25V/10dB Output impedance：50Ω Load impedance：more than10kΩ |
|
| RMS detection circuit | True RMS detection circuit（computing type） | |
| Processing | Digital | |
| Data Storage Functions | Sound pressure level or Processed values stored in built-in Memory or Memory card Manual Storage：Sound level, Calculation value, Memory time,Store the Sampling to Built-in memory or on Memory card, Auto Storage：Sampling interval 100ms, 200ms, Sound level,Leq etc. Processing Card ：Storage of calculation results |
|
| I/O | Direct output to printer, control and output data to computer Digital output of real-time noise waveform with USB interface | |
| Comparator Output | Comparator Function with threshold level | |
| Battery Type | Four 1.5V Alkaline cells IEC type LR6, Optional AC adapter | |
| Battery life | Alkaline dry cell ; Approx.9hours when Switch on a back light ;Approx.1/3 | |
| Operating temperature | Temperature：-10～50℃ Humidity：30%～90%RH(no condensation) |
|
| Size | 86(W) x 285(H) x 46(D) | |
| Weight | Less than Approx.450g(including Batteries) | |
| Applicable Standards | JIS C 1514（IEC61260):classI |
|---|---|
| Measurement mode | Sound pressure level(Lp) Equivalent continuous sound pressure level(Leq) Sound exposure level(LE) Maximum sound pressure level(Lmax) (One of the measurement modes selected as above is displayed.) |
| Frequency analysis band | 1/1-octave filter: 16Hz,31.5Hz,63Hz,125Hz,250 Hz,500Hz,1kHz,2kHz, 4kHz,8kHz,AP,OA 1/3-octave filter: 12.5Hz,16Hz,20Hz,25Hz,31.5Hz,40Hz,50Hz,63Hz,80Hz, 100Hz,125Hz,160Hz,200Hz,250Hz,315Hz,400Hz,500Hz, 630Hz,800Hz,1kHz,1.25kHz,1.6kHz,2kHz,2.5kHz,3.15kHz, 4kHz,5kHz,6.3kHz,8kHz,10kHz,12.5kHz,16kHz,AP,OA |
| Level Range Control | 10dB 6step 10～80dB、20～90dB、30～100dB 40～110dB、50～120dB、60～130dB (-10～60dB、0～70dB、10～80dB/0-dB function in ON) |
