When you press Start, the browser asks whether to allow the microphone. After you allow it, go through the stay-quiet and speak steps to check the input signal and clipping. The microphone is not used before you press Start.
Everything is measured inside this page. The measured values and results are not sent, saved or recorded.
Measure
The microphone sound is used only to measure the input level. It is analysed inside this page and discarded right away; it is not recorded, saved or sent.
Once the microphone is on, the level of the sound coming in is shown here.
Current input level–
Speaking time confirmed
–
Peak level while speaking
–
Background noise level
–
Sample rate
–
Channels
–
A different device applies from the next start. Device names appear only on this screen and are not put into the result summary.
Result
Criteria used
These are the criteria this test applies. The values and the basis come from the same table the test judges with.
Item
Criterion
Value
Basis
No input signal
Minimum speaking time JikCheck initial criterion
3,000 ms
Internal criterion: the minimum length of the speaking step. An initial assumption taken as the time it takes to say one short sentence.
No input signal
Peak level treated as no input JikCheck initial criterion
-60 dBFS
Internal criterion: an initial assumption that if the highest level while speaking is below this value, almost no input is arriving.
No input signal
Floor used to record digital silence Measurement definitionJikCheck initial criterion
-100 dBFS
Internal criterion: the recorded value for digital silence. A window whose samples are all zero has a level of negative infinity, which cannot be compared as a number, so any level at or below this value is recorded as this value. It is set lower than one step of a 16-bit sample (about -90.3 dBFS) and well below the highest-level criterion for judging no input, so digital silence is judged as no input.
Input too loud (clipping)
Minimum speaking time JikCheck initial criterion
3,000 ms
Internal criterion: the minimum length of the speaking step. An initial assumption taken as the time it takes to say one short sentence.
Input too loud (clipping)
Clipped share that calls for a check JikCheck initial criterion
1 %
Internal criterion: if the share of clipped samples (samples stuck at full scale; defined in the measurement-definition row of the criteria table) among the samples of the speaking step exceeds this value, advice that the input volume is high is shown.
Input too loud (clipping)
Sample size counted as clipped Measurement definitionJikCheck initial criterion
99.9 %
Internal criterion: the definition of a clipped sample. A sample whose absolute value relative to full scale is at least this value is counted as clipped. The maximum code of a 16-bit device is 32767/32768 ≈ 0.99997 and so never reaches exactly full scale; the value is therefore set just below full scale.
How to use and FAQ
?How do I use the microphone test?
Press Start microphone and allow the permission the browser asks for. Measure the background sound with Stay quiet, then speak for a few seconds in Speak and press I spoke. Choose Show result to see the highest level while you spoke and the clipping ratio next to their criteria.
?The permission prompt did not appear, or I denied it.
Allow this site's microphone in the site settings next to the address bar, then press Start again. The microphone access of the browser may also be switched off in the privacy settings of the operating system.
?What do the level values mean?
dBFS is a size measured against the maximum of the digital signal (0). The closer to 0, the louder; the smaller the value, the quieter. If the highest level while you spoke is below the criterion, “No input signal” is marked “Check needed”; if the share of samples cut off at the maximum is above the criterion, clipping is marked “Check needed”.
?Is the result proof for an exchange or warranty claim?
No. The result is a reference measurement calculated from signals your browser receives. Follow the seller’s or manufacturer’s rules for exchange and repair.
Within criteria
Check needed
Outside criteria
Cannot judge
Measured
Your report
{value}
{value} ms
{value} key(s)
{value} %
{value} Hz
{value} dBFS
{value} px
{value} fps
{value} point(s)
Start
Stop measuring
Show result
Measure again
Copy result summary
Ready. Press Start.
Measuring…
Measurement stopped.
Result
Result: {level}
Overall: {level}
Measured values
Criteria compared
If met: {level}
Reference values (not part of the judgement)
What to check next
Cannot be measured in this browser
Not applicable
JikCheck initial criterion
Copying…
Copied
Could not copy. Select the text below and copy it yourself.
Result summary (select and copy)
{name}: {current} / {needed}
{name}: {current} (enough for a judgement)
There is enough data for a judgement. You can press Show result.
You can press Show result before it is enough; items that lack data show “Cannot judge”.
JikCheck - {test}
Date: {date}
Browser: {browser}
Overall: {level}
{title}: {level} ({evidence})
Reference measurement from the browser. It does not confirm whether a device is faulty or why.
Unknown browser
Could not start the measurement. Press Start to try again.
Microphone test
No input signal
Whether any sound reached the microphone while you were speaking.
Input too loud (clipping)
How much of your speech was loud enough to be cut off at the maximum level. Input volume settings often cause this.
Peak level while speaking
Background noise level
Share of clipped samples
Sample rate
Channels
Speaking time confirmed
Minimum speaking time
Peak level treated as no input
Floor used to record digital silence
Clipped share that calls for a check
Sample size counted as clipped
Check the mute switch on the microphone or the mute button on the headset cable.
In the sound settings of the operating system, check that the input device is the microphone you are using. You can also pick another device in the device selection on this page.
Raise the input volume in the operating system. If the sound is cut off, lower it. If there is a microphone boost option, try adjusting it.
In the privacy settings of the operating system, check that the browser may use the microphone and that no other program has taken it over.
If it still happens, try another port or another device, then check the seller’s or manufacturer’s exchange and warranty terms.
Waiting for the browser's permission prompt. Choose Allow…
Permission was not granted, so the test could not start. Allow this site in the site settings next to the address bar, then press Start again. The operating system may also be blocking the browser's access.
The microphone cannot be used. Either permission was denied, or the browser could not start audio even though you allowed it. In the site settings next to the address bar, check that this site's microphone is allowed; if it is, press Start again. If it still fails, end any call or other app that is using audio and try again.
No usable device was found. Check that the device is connected and recognised by the operating system, then press Start again.
The device could not be opened. Another program or tab may be using it. Close it and press Start again.
The device could not be opened. Check the connection and the browser settings, then press Start again. If the device you picked cannot be used, switch the device selection back to the default device.
The tab was hidden, so measuring stopped and the device was turned off. Press Start to measure again.
The device was disconnected, so measuring stopped. Check the connection and press Start to measure again.
An error stopped the measurement and the device was turned off. Press Start to try again.
Another app or a call took over the audio, so the measurement stopped and the microphone was turned off. Once that is over, press Start again.
Default device
Device {n}
Start microphone
When you press Start, the browser asks whether to allow the microphone.
The microphone is on. First use “Stay quiet” to measure the background sound, then speak normally for a few seconds in “Speak”.
Do not speak; stay quiet for a few seconds. The background noise is being measured.
Keep speaking in your normal voice for a few seconds. If it is too short, the result is “Cannot judge”. When you finish, press “I spoke”.
The part where you spoke is confirmed. Speak again to replace it, or press “Show result”.
Digital silence