Sound Frequencies and Tinnitus: Why Pitch Matters

The audible frequency range

Humans can typically hear sounds from about 20 Hz to 20,000 Hz (20 kHz), though sensitivity at the extremes diminishes with age. The most important frequencies for speech comprehension are in the 500–4,000 Hz range. Most music sits between 20 Hz and 12,000 Hz. The frequencies most commonly lost to hearing damage — and most commonly associated with tinnitus — are in the 3,000–8,000 Hz band.

Why tinnitus most often affects high frequencies

The cochlea processes high frequencies at its base, where it is most exposed to the mechanical energy of incoming sound. This makes high-frequency hair cells the most vulnerable to noise damage and the earliest to deteriorate with age. When these cells die or become dysfunctional, the corresponding region of the auditory cortex loses its input — and the resulting neural hyperactivity produces a high-pitched tinnitus tone, most commonly perceived between 3 kHz and 8 kHz.

Tinnitus pitch matching

Pitch matching is the process of identifying the frequency that most closely resembles your tinnitus. It is typically done by an audiologist using an audiometer — you listen to pure tones at different frequencies and indicate which one sounds most like your tinnitus. This information can help:

• Confirm the frequency range of your tinnitus for the medical record
• Guide notch therapy (which requires a precise pitch match)
• Help you choose the right masking sound (a pure tone or noise band centered on your tinnitus frequency)

You can do a rough self-assessment using an app that plays pure tones at different frequencies, though formal audiological pitch matching is more precise.

The 1 kHz, 4 kHz, and 8 kHz ranges in Acuhealer

Acuhealer's Pure sound offers tones at three frequencies — 1 kHz, 4 kHz, and 8 kHz — chosen to cover the most common tinnitus pitch ranges:

• 1 kHz: Low-range tinnitus, sometimes associated with Meniere's disease or conductive hearing loss.
• 4 kHz: The most common noise-induced tinnitus frequency. The classic "4 kHz notch" in audiograms from noise exposure corresponds to the most vulnerable hair cell region.
• 8 kHz: Higher-pitched tinnitus, often from more diffuse high-frequency hearing loss or aging.

To find your best match, try each frequency and notice which blends most naturally with your internal sound — the one that feels most similar or that partially covers it.

Why low-pitched tinnitus is different

Tinnitus that sounds like a low hum or rumble — below 1 kHz — is less common and may have different causes, including Meniere's disease, endolymphatic hydrops, or conductive hearing loss from middle ear problems. Low-pitched tinnitus sometimes fluctuates with symptoms and may respond to different masking approaches — deeper sounds like pink noise tend to work better than high-frequency white noise.

Notch therapy and frequency precision

Notch therapy, one of the most promising experimental treatments for tinnitus, requires very precise frequency identification. The exact tinnitus frequency is "notched" out of music or broadband noise, theoretically reducing neural activity at that frequency over time. The closer the notch to the actual tinnitus frequency, the better the potential benefit — making precise audiological pitch matching important for this approach.