Understanding Low, Mid, and High Frequencies

Understanding Sound: Low, Mid, and High Frequencies

Sound is made up of different frequencies, measured in Hertz (Hz), which we perceive broadly as lower or higher tones.

Crucially, acoustic materials do not absorb every frequency equally. Knowing which frequencies you are targeting is key to selecting the best acoustic products for your space.

The Frequency Spectrum

Not all sound behaves the same way.

• Low frequencies → Longer wavelengths
• Mid frequencies → Much of the important speech range
• High frequencies → Shorter wavelengths

Acoustic performance can change significantly from one frequency to another.

Why Material Thickness & Frequency Matter

• Low Frequencies (Bass, HVAC hums, heavy footfall): Low-frequency sound waves have longer wavelengths and generally require thicker, specialized acoustic products to absorb them effectively.

• Mid Frequencies (Human speech & chatter): Represents much of the core human voice range. Targeting mid frequencies is essential for improving speech clarity and reducing workplace chatter.

• High Frequencies (Ringtones, typing, high-pitched clicks): High-frequency sounds have shorter wavelengths and can typically be absorbed by thinner, porous surface treatments.