Not sure where you’ve experienced but when I was in Shanghai it was definitely noticeable, nowadays I’m in Tokyo and I can’t wait for all the mopeds and motorcycles in particular to get electrified.
>>presen+(OP)
Could be related to speed and asphalt and macadams. I travelled to Guangzhou a few months ago, the noise on the road is comparable to Beijing, despite having significantly higher proportion of EVs.