TapNoiseTapNoise is quiet by default while an app uses the microphone. If typing sounds disappear as a call starts and return afterward, Quiet during calls is the first setting to inspect.
Confirm the status
Open the TapNoise menu and look for Quiet while your mic is on. In Settings › General › Playback, check Quiet during calls.
The app detects microphone use rather than understanding your calendar or conversation. Dictation, a voice recorder or an open Sound input meter can therefore cause the same behaviour even outside a meeting.
Decide what you want to hear
Leave the option enabled if speaker playback might reach the call microphone. If you intentionally want keyboard audio during a recording, turn it off for that test and listen back before sharing the result.
Headphones reduce room playback but do not determine whether a recorder captures system audio. Inspect recording sources separately instead of assuming nobody else can hear what is in your headset.
If playback never returns
Close apps that may still be using input, check the macOS microphone indicator and inspect TapNoise’s menu again. Then follow the ordinary sound checks: Sounds enabled, volume, output and Input Monitoring.
TapNoise does not record the microphone to make this decision. For the distinction between activity detection and recording, read the orange microphone indicator. For deliberate capture, see recording a sound demo.
Sources: TapNoise Quiet during calls, Apple’s microphone input documentation.