1. Verify Input Device in OBS: In OBS, go to Settings -> Audio, and make sure that the Blue Yeti microphone is selected as the correct input device.

2. Inspect ALSA/PulseAudio Configuration:

- Open a terminal and run `arecord -l` to list all the available recording devices. Verify that the Blue Yeti is listed.

- Check PulseAudio configuration with `pavucontrol` and ensure that the Blue Yeti is not muted and is set as the default recording device.

3. Adjust Sample Rate: Sometimes, the sample rate mismatch can cause issues. In the PulseAudio configuration file `/etc/pulse/daemon.conf`, you may want to uncomment and set `default-sample-rate = 48000` and `alternate-sample-rate = 48000`. After editing, restart PulseAudio with `pulseaudio -k`.

4. Check OBS Logs: OBS logs might contain information regarding the issue. You can find the logs under "Help" -> "Log Files".

5. Check Kernel Module: Sometimes, USB microphones require the `snd-usb-audio` module. Check if it is loaded using `lsmod | grep snd_usb_audio`. If not, load it with `sudo modprobe snd-usb-audio`.