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 ".

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

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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.

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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

2020/05/25

Canceling the emergency declaration in Kyoto

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Last weekend, the emergency declaration for COVID-19 in Kyoto, Osaka and Hyogo was lifted.

I went to Kyoto Gyoen National Garden. It has a relaxed atmosphere with few people.

The public opening of the Kyoto Imperial Palace has resumed, but it needs to check the body temperature to enter.

posted by toons at 17:17 | diary

2020/05/22

New updated - "Sound Level Analyzer Lite" ver 5.0 - Free of charge!

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"Sound Level Analyzer Lite" was updated to ver 5.0.

"Sound Level Analyzer Lite" is a sound level meter app for iPhone.

It is a free edition that has simplified the function of "Sound Level Analyzer".

Available in variety of applications as the neighboring environmental noise measurement, audio system check, vehicle interior noise check, sound check of live events, and more.

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If you are interested in this app, please click the following link to display on the product information of App StoreTM.

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posted by toons at 13:23 | diary

COVID-19 activity restriction stress and noise problems.

With the COVID-19 pandemic, we spend a lot of time at home.
At the same time, it seems that noise troubles are occurring frequently. In Tokyo, the number of cases of noise disputes in March and April increased by nearly 30% compared to last year.

There is annoying noise around my house now. The renovation work in the neighborhood has resumed, and the noise is becoming extremely loud.

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I felt noises as a fairly low frequency, so I investigated what kind of noise is present there by using " Low Frequency Detector " app.

As a result, many low frequency noises were clearly detected in the frequency range of 20Hz to 110Hz.

I will keep this noise data as evidence to prepare for future problems.
posted by toons at 12:33 | Environmental noise

2020/05/18

New updated - "Sound Level Analyzer" ver 4.0

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"Sound Level Analyzer" has been updated to ver 4.0.

"Sound Level Analyzer" is a standard sound level measurement app with sound frequency analysis tools.

It can display automatically the instantaneous sound level and has additional analysis modes, which are time graph, frequency realtime analyzer (RTA) and FFT analyzer. It can be used to analyze the characteristics for the sound / noise source.

Available in variety of applications as the neighboring environmental noise measurement, audio system check, vehicle interior noise check, sound check of Live events, and more.

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Power spectrum shows the graphic chart by 1/3-octave band response analysis in 24 band (100 Hz to 20 kHz) and FFT analysis in real-time.

In the latest version, the FFT analysis display has been changed to make it easier to see the frequency bands with high audibility (100Hz-3kHz, 3kHz-6kHz). Also, it has been added a process to prevent erroneous operation during measurement.

# Power Spectrum (1/3-octave band response analysis, FFT analysis)
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#FFT analysis (100Hz-3kHz, 3kHz-6kHz)
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In addition, it can display the frequency spectrum characteristics at the moment when the maximum sound level "Lmax" has occurred.

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If you are interested in this app, please click the following link to display on the product information of App StoreTM.

Available_on_the_App_Store_Badge_US-UK_135x40.png

posted by toons at 23:18 | News