Knowledge Why does an ultrasonic cavitation machine produce noise? Understanding 40kHz Vibrations for Fat Loss
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Tech Team · Belislaser

Updated 2 days ago

Why does an ultrasonic cavitation machine produce noise? Understanding 40kHz Vibrations for Fat Loss


The noise produced during ultrasonic cavitation is a normal byproduct of the technology's mechanics. It is the audible manifestation of ultrasound waves—typically operating at a frequency of 40kHz—traveling through the skin to target adipose tissue. This sound confirms that the device is actively generating the vibrations required to rupture fat cells in the dermis.

The specific "ringing" or buzzing noise you hear is often a sensation of tinnitus caused by the micro-vibration of fat cells. This is a standard part of the therapy and indicates the ultrasound waves are successfully interacting with the targeted tissue.

The Source of the Sound

The Frequency Factor

Ultrasonic cavitation machines function by emitting low-frequency sound waves, often set at 40kHz.

While this frequency is technically "ultrasonic" (above normal human hearing), the physical impact of these waves on the body creates a perceivable sensation.

The Tinnitus Sensation

The noise is not always an external sound heard through the air.

Instead, patients often experience a sensation similar to tinnitus (a ringing in the ears).

According to the primary technical data, this sensation is caused by the micro-vibration of fat cells responding to the ultrasound waves.

Contextualizing the Noise: How Cavitation Works

Creating Micro-Bubbles

To understand the noise, you must understand the physical stress being placed on the tissue.

The machine sends waves into the body to create microscopic bubbles within the fat tissue.

Cellular Disruption

These bubbles expand and rapidly collapse due to the pressure changes caused by the sound waves.

This collapse causes a physical disruption that ruptures the fat cells, allowing triglycerides to leak into the extracellular space.

Natural Elimination

Once the cells are broken down, the body's lymphatic system processes the waste.

The liver metabolizes the released triglycerides, and they are naturally flushed from the system.

Understanding the Trade-offs and Safety

The Importance of Technique

While the noise is normal, the intensity of the machine must be managed carefully.

Incorrect usage includes applying waves too aggressively or at an intensity that is too high for the specific patient.

Avoiding Tissue Damage

The ultrasound waves must be distributed evenly over the treatment area.

Never focus the machine on a single spot for an extended period, as this can lead to tissue damage.

Contraindications

Do not use the machine on broken, irritated, or infected skin.

Using the device on compromised skin increases the risk of severe infection.

Making the Right Choice for Your Goal

While the noise can be surprising, it is a verifyable sign that the technology is operating as intended.

  • If your primary focus is treatment efficacy: Accept the ringing sound as a positive indicator that the 40kHz waves are successfully vibrating and disrupting fat cells.
  • If your primary focus is safety: Ensure the noise is accompanied by constant movement of the wand; if the sound changes pitch significantly or you feel sharp heat, adjust the intensity immediately.
  • If your primary focus is recovery: Drink plenty of water immediately after the session to aid the lymphatic system in flushing out the processed fatty acids.

The noise is simply the acoustic signature of the cellular vibration that makes the treatment effective.

Summary Table:

Feature Detail
Standard Frequency 40kHz (Low-frequency ultrasound)
Auditory Sensation Tinnitus-like ringing or buzzing in the ears
Primary Cause Micro-vibration and collapse of fat cell bubbles
Significance Confirms the device is actively rupturing adipose tissue
Safety Check Sound should be consistent; move the wand continuously
Post-Care Tip Hydrate to assist lymphatic drainage of fatty acids

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