Recently i bought a ReSpeaker USB Mic Array for my RapberryPi 4 (8Gb).
I use this Mic for GoogleAssistant (SDK), but it hears me badly.
I decided to check the Mic with next commands:

[ pi@raspberrypi:~ $ arecord test.waw ] — and say some words.
answer:
[ Recording WAVE ‘test.waw’ : Unsigned 8 bit, Rate 8000 Hz, Mono
^CAborted by signal Interrupt… ]

[ pi@raspberrypi:~ $ aplay test.waw ] — I hear my words with VERY loud digital noise and interference!
answer:
[ Playing WAVE ‘test.waw’ : Unsigned 8 bit, Rate 8000 Hz, Mono. ]

Then i cheked Mic with commands:
[ arecord --format=S16_LE --duration=5 --rate=16000 --file-type=raw out.raw ]
[ aplay --format=S16_LE --rate=16000 out.raw ]
With these commands the sound was PERFECT ! (just some echo).

I suppose that my Mic records sound in bad quality (by defalt), because my GA hardly hears me from distance even 1 metre.
Can you help me with this problem ?
I want to have my Mic recording always with good quality.

Best wishes!