我正在使用 Ubuntu 18.04LTS。我的麦克风无法被操作系统识别。如果我尝试录制某些内容，它只会发出随机噪音。麦克风在同一台计算机上的 Windows 中工作良好，音频质量良好。
在线测试甚至无法识别耳机麦克风的输入。
Intel Microphone Array用于声音输入的窗口。
在 Ubuntu 中，声音输入设备显示：Internal Microphone- Built-in Audio
的输出sudo lshw -class multimedia为：
*-multimedia
description: Audio device
product: NVIDIA Corporation
vendor: NVIDIA Corporation
physical id: 0.1
bus info: pci@0000:01:00.1
version: a1
width: 32 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list
configuration: driver=snd_hda_intel latency=0
resources: irq:17 memory:a3080000-a3083fff
*-usb:0
description: Video
product: Integrated_Webcam_HD
vendor: CNFHH46P3354200FE7C0
physical id: 5
bus info: usb@1:5
version: 85.11
serial: 200901010001
capabilities: usb-2.01
configuration: driver=uvcvideo maxpower=500mA speed=480Mbit/s
*-multimedia
description: Multimedia audio controller
product: Cannon Lake PCH cAVS
vendor: Intel Corporation
physical id: 1f.3
bus info: pci@0000:00:1f.3
version: 10
width: 64 bits
clock: 33MHz
capabilities: pm msi bus_master cap_list
configuration: driver=snd_hda_intel latency=32
resources: irq:130 memory:a54a0000-a54a3fff memory:a5200000-a52fffff