Can the HOFA Acoustic Curtain be helpful to isolate noise from outside, for example street noise?

Yes it can be helpful, but: street noise is usually a very wideband noise mixture. It includes high, mid-range and sometimes very low frequencies, for example buses or trucks passing by. In the mid and high frequency range, the HOFA Acoustic Curtain works very effectively. For physical reasons it is not possible to achieve an effective insulation in the low end. So it depends on the exact nature of the (street) noise, whether the HOFA Acoustic Curtain is the right approach to improve the acoustics in this case. We would like to talk to you personally on your individual acoustic problem. Feel free to contact us: akustik@hofa.de or by phone: +49 7251 3472-400