DIY soundproofing for external wall? (but attaching it internally)

Was looking at these?

https://www.amazon.co.uk/Super-Dash-Pyramid-Acoustic-Foam/dp/B08L5ZCNW8/ref%3Dsr_1_7?crid=1RH1F93B3YH9S&keywords=soundproofing&qid=1640292899&sprefix=soundproofing%2Caps%2C88&sr=8-7&th=1

Acoustic foam?

Recommendations?

Basically the back wall of a room is connected to a vent which goes to an underground car park, and said car park contains a loud ass water pump which sends high frequency sound waves up said vent, into muh room.

Would something like this adhered to the wall be effective to manage that?

Esel

Sounds like the vent is the source of the noise? Insulating the walls won't affect that.

10-10-20

High frequency now, or low frequency? Pumps generally create LF noise from the impeller and bearing systems as resonance (a low rumble) which propagates through physical structures, but HF could be coming off the variable power control and drive systems. A HF noise component can also result from mechanical issues such as bearing failures. As mentioned by Esel, this noise typically carries through the air rather than through walls.

Muffling the vent could be suggested for HF noise. A muffle could comprise of a thick acoustic material covering with a significant overlap of the vent but still providing an airflow path.

My room is like, vent adjacent.

As in the actual vent panel doesn't connect to my place, but the back wall of my room is adjacent to the vent duct.

And the vent has no fan, it's just an opening from the underground car park to the open air.

The issue is this facilitates the water pump noise travelling up the outlet duct which is adjacent to my bedroom back wall.

What I have in mind is to hang some thick curtain against said wall, just use a series of stick on hooks (typically used on a bathroom door), will have to use several to support the curtain weight.

......

But I've seen mixed reports of acoustic foam as in, it doesn't really sound proof, is only useful to stop reverb internally.

Emma2019

You can get vents that have a baffle on them to reduce sound ingress.

I'm getting soundproofing done and was advised to use these:

https://www.soundinsulation.ie/product/mustwall-33b-for-party-walls/

com1

I am assuming that the vent does not have an opening into your room...

I'd be having a discussion with the owners of the vent. I would think that they need to get whoever supplied/installed the pump and vent to adequately mitigate any noise / vibration form the pump/vent combo.

onlinemathsgr

A baffle might be the way to go if you can speak to the owners? Do you own the property or just renting?

I only ask cos if your renting, you can always move.

thanks

https://www.boards.ie/discussion/comment/118381358#Comment_118381358

Yes, move? Just like that?

You renting?

Having a nice place I can move into?