Advice Needed: How Much Land is Enough to Shield Against Agricultural Equipment Noise?

Hi everyone,

I’m exploring the idea of establishing a permaculture site and need some advice. One of my main concerns is noise pollution from nearby agricultural equipment like tractors, combine harvesters which can get extremely loud (often exceeding 90-100 dB).

For those who’ve dealt with similar issues:

1. How much land or buffer zone would be ideal to create a peaceful environment? Is there a general rule of thumb for distance when it comes to mitigating loud machinery noise?
2. Landscaping strategies: Are there specific tree species, hedges, or combinations that work best for reducing noise? Would creating berms, earth mounds, or natural sound barriers significantly help?
3. Other considerations: Should I factor in things like wind direction, terrain, or seasonal foliage changes when designing for noise reduction?

I’d love to hear about any experiences, tips, or resources that could help guide me in planning this.

Thanks in advance for sharing your insights!