Decibel Meter, NOYAFA Digital Sound Level Meter with A/C Weighted, 30 to 130 dB SPL Meter with MAX/MIN, Data Hold, Auto Power Off,Alarm, Noise Meter for Classroom, Office, Factory

This product works well and detects the noise level which is what I wanted. I tested the new hair dryer and the vacuum cleaner. Safe noise level should be below 70 dB. I was hoping it could distinguish noise levels from various sources and I haven't not tested outside.

This product feels a bit cheap and not well calibrated. Despite the room being at a fairly low and constant volume, I can see jumps of 10 to 15 dB, representing 3-5 TIMES the amount of relative volume. Doesn't feel quite right to me.However, I do not have the equipment to verify this, besides an Apple Watch that did do me good over the years.It is, however, very easy to use, and works well beyond the aforementioned inaccuracies.

Review for: "Decibel Meter, NOYAFA Digital Sound Level Meter with A/C Weighted, 30 to 130 dB SPL Meter with MAX/MIN, Data Hold, Auto Power Off, Alarm, Noise Meter for Classroom, Office, Factory"Brand: NOYAFAFirst Look: The NOYAFA Digital Sound Level Meter came inside blue & black double-zippered case inside a box 26 cm x 5.5 cm x 11 cm with the user manual, warranty information, and the 4 "AAA" alkaline batteries needed to operate the device.Operation: the 4 batteries go in the back easily. Long-press the "HOLD" button to start. There's a max/ min button at the top that cycles "MAX", "MIN" and "Real-time". Press this button to lock the maximum and minimum levels.The "LEVEL" up/down button allows the display to change the range. "Auto" will automatically select the appropriate range. The other options are: Level 1: 30-80 dB, Level 2: 60-110 dB, or Level 3: 80-130 dB. On these settings, if the noise is below this set range, it will show the word "UNDER" on the left in red, and if the noise is higher than the set range, it will show the word "OVER" in red on the right.The A/C button: If the noise is detected by human ears, select dB A. If high intensity mechanical noise is measured, select dB C.The "FAST/SLOW" button will read real-time noise on fast, or average on slow.Short-press the "HOLD" button to keep the current measurement. Long-press "HOLD" to turn the power to the device on or off.User Manual Information: The measurement range of the devices from 30 to 130 decibels (dB).It goes into sleep mode after 10 minutes of no activity, and automatic shutdown function after 20 minutes. Long-press the A/C button to turn off or activate this function. It shows a red alarm clock symbol with lightning bolt in the top left corner of the screen (near the battery level) when active.There is a bar at the bottom of the screen that shows green between 30 and 63.3, yellow from 63.4 to 96.6, and red from 96.7 to 130. It is known that long or repeated exposure to sounds at or above 85 dBA can cause hearing loss, so it might be better to have the "red" warning at a lower number.Opinion: I ordered this device to measure the sound level of my Cockatoo Parrot, and he didn't disappoint by waking up in the night just to scream. The MAX/MIN worked differently than I expected. If you want to record the Maximum, it has to be on "MAX" and it will just keep the maximum amount, and increase if there is a higher number. On Real-time, it doesn't record the max or min. When you press the button to move it from Max to Min or Real-time, it will reset the numbers again. I tried the device on "dB A" and "dB C" and also on "FAST" and "SLOW" to record the cockatoo's screams. The largest number I recorded was 110.0 dB on FAST and dB C. I left the unit range on "Auto". 110dB is louder than being next to a helicopter!After playing with this for half an hour, the battery level was already down to 3/4 bars. It might be better to be rechargeable if it's going to be used a lot. I don't have a way to test the meter for accuracy but it seems to work as expected.

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Nice sound level meter used at my church to make sure sound levels are safe

It may be my fault that I thought this would be useful. Living in a city with construction noise nearby and sometimes someone's failing AC unit making very loud noise, I thought this might be nice to have to see if levels exceed the city's permissible limits for a residential area. While it read similar to my phone, I have no way of knowing whether thing is accurate. I realized fairly quickly that using my phone is really just as good. This is clunky and takes up storage space. If you have a serious concern about the impact of noise on your hearing from a job or noisy activity (likes lots of loud concerts), do research and be sure you are getting a meter that will be easy to use and accurate. For me, I probably shouldn't have ordered this.

I had wanted a decibel meter for a while to test the claims of compressors, vacuums, tools, and other household appliances. So when this one came up I decided to give it a shot and ordered it.It comes in a nice case with an instruction sheet, certification card, and batteries.The meter has very simple controls that make it easy to turn on and play with, but as far as knowing what it is doing, that requires either prior experience or research. For example this meter has the ability to switch between DbA and DbC scales, but the instruction sheet does not explain what those are. I like that the screen on this meter is bright, with good contrast and displays the numerical Db readings prominently below a raised scale with color indications. I also like that it is made to fit comfortably in your hand or can be mounted to a camera tripod via the threaded socket on the back. I have tried this on numerous tools and appliances, and in my uninformed opinion it is accurate. For example my dad's compressor says that it is 70db and the meter pegged it at 70. Overall, I am happy to have this tool and find myself pulling it out to see how loud random things around the house are as well as checking the claims of tools and appliances. If you are looking for a decibel meter that won't break the bank, then I think this is a good choice considering all of the features that it has, however I have not done research or compared the price of this meter to others.

The NOYAFA Digital Sound Level Meter is a well made and versatile straightforward tool for accurately measuring ambient noise levels in various environments. With A/C weighted functionality, it captures sound frequencies in a way that suits both general and specific sound level monitoring. In my experience, the measurements are consistent, and the meter seems to be pretty accurate when compared to other metering devices I use. It’s particularly useful for those who need accurate readings in environments ranging from home studios to offices or public spaces where sound control is required.The design is user-friendly, featuring a clear LCD display with easily readable digits, even in dimmer settings. The lightweight, portable build also makes it easy to handle for extended periods and it also has a threaded tripod mount. It also comes with a padded storage case.Switching between A-weighted and C-weighted measurements is straightforward, which helps when monitoring both environmental and industrial noise. It has a data hold feature and also min / max reading settings plus the ability to switch from fast and slow modes to help mimic how the human ear recieves sound. Battery life holds up well, and the device powers off automatically when not in use, saving power. Overall, this sound level meter from NOYAFA works well and is solidly built. It's packed full of features yet really easy to use. I would recommend this sound meter.

I bought one of these to replace my old sound pressure meter and this one with the colorful display works absolutely perfect, highly recommend .

Seems to work fairly well although I do not have a calibrated source to check the accuracy. It comes with a "Qualification Certification" card that claims it meets GB/T2900.90-201, but this appears to be some Chinese standard for "Electrical and electronic measurements and measuring instruments" and I can't find a good source to see what, if anything, it states for sound meters (which even that reference has a typo as the last part, "201", is supposed to be a year and most likely should be 2012). So, good for personal use but I don't think this would fly for anything official. I'm not taking any stars off for that though as it doesn't claim otherwise.The colored bar at the bottom of the screen changes color between green-yellow-red in response to the decibel range and seems to correspond to 65db and 100db as the transition points. While a nice feature, I think the limits could've been picked better. I would've preferred 80db and 90db as these correspond to around the points workplace regulations kick in (at least for the US and EU). Since decibel is a logarithmic scale, there's still quite a big difference between 80-90 as 90db has 10 times the power in its sound waves as 80db.The carrying case is also nice/helpful and has space to put 4 AAA batteries (which it comes with 4 AAA alkaline batteries placed there) for a spare set. But they really should've put a bottom backing foam piece under it as the batteries will slip under the foam currently (if you can't find all four of the included batteries it's probably under the foam in a different part of the case). The case has a zippered section on the inside of the lid though, which could fit many more batteries (or other small accessories) if needed. Which it does seem to be a bit power hungry for something that uses AAA batteries. My rechargeable AAAs are lasting less than an hour before I need to swap them out.It has a tripod screw mount on the bottom of the device for mounting horizontally (but none on the end for vertical mounting). Especially for this mounted application, I think some kind of way to plug in an external power source (e.g. USB) in would've been very useful.The min/max function only shows you the min or max while it's set in that mode unfortunately, and not the min/max for the current session. So you can't actually see both the min and max for the same period of time (well I guess you could if you used two of them), and you won't be able to see a real time numerical readout, but the sound meter section of the display does continue to update in real time. The sound meter section of the display always updates in real time in fact, even if you press hold, which only freezes the numerical readout.