Currently, the market for sound insulation materials is mainly divided into two camps: traditional fiber-based materials (such as glass wool and rock wool) and new nano-based materials (such as aerogels). Traditional materials have high cost-effectiveness and mature technology; while new materials have outstanding performance and are suitable for high-end demands. 
Glass wool is the benchmark product of traditional fiber sound insulation materials.
By adopting advanced ultra-fine fiber technology, the fibers are uniform and fine, with a well-developed pore structure. It has outstanding mid-to-high frequency sound absorption performance and a noise reduction coefficient of over 0.8. The product has passed national environmental protection certification, is free of formaldehyde and odor, has A-level fire resistance, and has remarkable insulation and heat preservation effects. It is the mainstream choice for household use and ordinary industrial installations. In terms of price, glass wool is affordable and practical, the construction process is simple, and it can significantly reduce engineering costs, thus being favored by decoration companies and homeowners. 
Rock wool is a specialized material for high-noise environments.
Based on natural basalt resources, the high-density fiber board produced through high-temperature melting has extremely strong structural stability and acoustic damping performance. It can not only efficiently absorb mid-to-high frequency noises, but also has a good noise-blocking effect on low-frequency vibration noises. The weighted sound insulation level can reach 35 dB. At the same time, rock wool has excellent fire resistance, waterproofing, and corrosion resistance properties, meeting strict industrial standards, and is widely used in high-noise places such as factory machine rooms, KTVs, elevator shafts, and airport terminals. 
Aerogel represents the cutting-edge technology in sound insulation materials.
As a nano-porous material, its extremely high porosity and unique microstructure give it a sound insulation efficiency far exceeding that of traditional materials. It also possesses advantages such as ultra-thinness, light weight, environmental friendliness, and durability. Although the price is relatively high, in scenarios with extremely high demands for silence, such as high-end decoration, audio-visual rooms, and precision instrument rooms, the cost-effectiveness of aerogel is unparalleled. 
Industry experts predict that in the future, sound insulation materials will evolve towards higher performance, environmental friendliness, and multi-functionality. For consumers, when choosing sound insulation materials, they should comprehensively consider their own needs, the characteristics of the scenarios, and the budget. They should prioritize products with strong brand strength, advanced technology, and a good reputation to ensure both the sound insulation effect and the safety of use.