I have an inverter generator, it is incredibly quiet when idling along. But as you put more load on it it begins to rev up. As it revs up it makes more noise. Even fully revved up it is quieter than a non inverter generator.
If the exhaust is pointing at you it is fairly loud even 50 feet away. If the exhaust is pointing away it is quieter and if there is something between you and it it becomes very quiet. However that doesn't mean neighbors wont hear it, it just means it will be fairly quiet. The quieter the neighborhood is the easier it will be to hear.
Often times in the evening when things get quiet and the wind stops blowing I can hear my neighbors gate opening and closing a half mile away and I can hear their their conversations but can't quite make out what they are saying. So at that time I would expect even the quietest generator would be heard by them.
If the exhaust is pointing at you it is fairly loud even 50 feet away. If the exhaust is pointing away it is quieter and if there is something between you and it it becomes very quiet. However that doesn't mean neighbors wont hear it, it just means it will be fairly quiet. The quieter the neighborhood is the easier it will be to hear.
Often times in the evening when things get quiet and the wind stops blowing I can hear my neighbors gate opening and closing a half mile away and I can hear their their conversations but can't quite make out what they are saying. So at that time I would expect even the quietest generator would be heard by them.