Soundproof rooms cannot completely block out all sounds. Although they are designed to reduce the impact of external noise and provide a relatively quiet environment, complete soundproofing is almost impossible to achieve. Here are some key points to explain why soundproof rooms cannot completely block out all sounds:

Physical limitations: Sound is generated by vibration and propagates through a medium (such as air, solid). The main function of a soundproof room is to block or reduce the propagation of sound waves through structures such as walls, doors and windows. However, due to the physical properties of sound, especially low-frequency sounds (such as low roars), they can penetrate or bypass obstacles, so it is very difficult to completely block out all sounds.

Materials and design: Soundproof rooms usually use multiple layers of materials, such as double or triple-glazed windows, soundproof walls (including sound-absorbing materials), sealed doors, etc. These designs can significantly reduce the transmission of sound, but they cannot completely eliminate sound. For example, gaps, holes, improper sealing, etc. can become channels for sound.

Challenges of low-frequency sounds: Low-frequency sounds (such as traffic noise, mechanical vibrations, etc.) are more difficult to isolate than high-frequency sounds. This is because low-frequency sound waves have longer wavelengths and can more easily bypass obstacles or pass through tiny cracks in the wall.

Environmental factors: The environment in which the soundproof room is located will also affect its soundproofing effect. For example, a soundproof room near a busy street may be affected by more external noise, even if the soundproofing design is excellent.

Construction quality: Even the best soundproofing design will result in a significant reduction in soundproofing if the construction quality is poor. Problems such as improper installation and poor material quality will weaken the soundproofing effect.

Practical application
Despite the above limitations, it is necessary to install a soundproof room. For example, in places such as recording studios, music studios, hospitals, laboratories, and conference rooms, although it cannot be 100% soundproof, a soundproof room can significantly improve the sound environment and provide a more focused and quiet workspace.

In short, a soundproof room can significantly reduce the interference of external noise, but it is very difficult to achieve a completely silent state. In order to achieve the best possible soundproofing effect, it is necessary to comprehensively consider multiple aspects such as the choice of soundproofing materials, the quality of design, and the sophistication of construction.