Whether you’re a singer, speaker, or vocal coach, the Lax Vox Tube is a game-changer for vocal health and performance. Developed by Marketta Sihvo, PhD and Ilter Denizoglu, MD, this simple yet powerful voice training tool is trusted by opera singers, speech therapists, worship leaders, public speakers, and vocalists around the world.

At Relentless Pursuit Creative, we believe that your voice was made to carry power, beauty, and truth. That’s why we’re passionate about tools that support vocal excellence and vocal health—and the Lax Vox Tube is at the top of our list.

What Is the Lax Vox Tube?

The Lax Vox (Latin for “relaxed voice”) is a specially designed semi-occluded vocal tract exercise tool. It trains your voice to function from the diaphragm, rather than straining your throat or vocal cords.

With the Lax Vox Tube, you will:

• Strengthen your vocal cords without overuse

• Learn diaphragmatic breath control for singing and speaking

• Warm up safely and effectively in just 5 minutes a day

• Enhance vocal projection with clarity and power

How to Use the Lax Vox Tube

Using the Lax Vox Tube is simple. Here’s the basic method:

1. Fill a glass halfway with water and insert the tube about 1 inch deep.

2. Place the other end of the tube gently between your lips.

3. Inhale through your nose, and exhale with sound—making a bubbling //whoooo// noise into the water.

4. Focus on letting your diaphragm do the work—not your throat or larynx.

5. Glide your pitch up and down, or run vocal scales.

To learn the full step-by-step technique, visit our in-depth usage guide.

Why the Lax Vox Tube Works

The Lax Vox technique is rooted in vocal science. When you phonate into a tube submerged in water, it creates back pressure that relieves tension from your vocal cords while engaging your core breath support.

This method is backed by peer-reviewed research, including:

• Lax Vox as a Voice Training Program for Teachers – Journal of Voice (2017)

• The Effects of Phonation Into Glass, Plastic, and LaxVox Tubes in Singers – Journal of Voice (2018)

Explore more about the vocal science behind Lax Vox.

Who Should Use the Lax Vox Tube?

The Lax Vox is ideal for:

• Singers and vocalists (classical, contemporary, worship)

• Preachers and public speakers

• Voice-over artists and podcasters

• Teachers and performers

• Speech-language pathologists and vocal coaches

Whether you’re warming up before rehearsal, recovering from vocal strain, or building long-term vocal health, the Lax Vox offers a low-impact, high-benefit approach.

Discover how it can unlock your full vocal potential.

Lax Vox Tube Care and Cleaning

To keep your tube hygienic and effective:

• Rinse with warm water and soap before and after each use

• Clean regularly with a straw brush

• Air dry completely before storing

• Do not place in the dishwasher