2020/05/26

High frequency noise

The emergency declaration was lifted all over Japan, and social activities are beginning to resume.

I was annoying the noise came in the back alley about 30 m away, it seemed the asphalt cutter that the pavement was being peeled off.

I moved to the window and measured it using the high frequency noise detection app, " Mosquitone Detector ".

Detect(8k-16k).png

In detection mode, the maximum noise level was 61.4 dB at 8-16 kHz, which was not so big level.

Detect(16k-24k).png

The noise level was even lower at 16-23kHz. This was because the amount of attenuation due to distance was more larger in the high frequency range.

Search(8k-16k).png

In search mode, it was simply showing the direction of the window.

The construction work seemed to be completed in 20-30 minutes. The noise was annoying sound, so I was relieved to stop it in a short time.
posted by toons at 10:28 | Environmental noise