On 5 Nov, 14:08, wrote:
Dear Group,

I am in a situation where I need to minimise sound transmission into a
room (noises such as sirens and raised voices, not low frequency or
road noise).

There is no option of secondary glazing due to the fact that there is
a Juliet balcony. The only option is 'upgrading' the existing 24mm
(4-16-4) sealed units. I appreciate this is not the ideal option.

So, what is the ultimate 24mm sealed unit for sound reduction?

Different thicknesses of laminated glass? Gas filled? Sound insulating
spacer bars?

Many thanks for any advice/experience that anyone can share.

Regards,

Alex

Also, bear in mind there may be trickle vents letting sound in, in
which case improving the glazing may not help.
Simon.