Equalization Techniques Beyond Valsalva

Ear equalization methods for divers — Frenzel, Toynbee, voluntary tubal opening, and knowing when to abort a descent.

Ear equalization — the process of balancing the pressure in your middle ear with the increasing ambient water pressure during descent — is the skill that causes more aborted dives, more ear injuries, and more frustration among new divers than any other aspect of diving. The standard Valsalva maneuver (pinch your nose and try to exhale through it, forcing air into the middle ear through the Eustachian tubes) works for most people most of the time, but it is inefficient, forceful, and can cause injury if performed aggressively against a blocked tube. Alternative equalization techniques offer gentler, more reliable pressure management that reduces ear barotrauma risk and allows easier descent for divers who struggle with the Valsalva approach.

The Frenzel Maneuver

The Frenzel maneuver uses the tongue as a piston to pressurize the nasopharynx (the space behind the nose and above the soft palate) rather than using the lungs as the pressure source like Valsalva does. Close your mouth, pinch your nose, close your glottis (the valve at the top of your windpipe — the same closure you make when lifting a heavy object or straining), and use the back of your tongue to push upward against the soft palate. This tongue movement compresses the air trapped in the nasopharynx and forces it into the Eustachian tubes and middle ear spaces. The advantage of Frenzel over Valsalva is gentleness and precision — Frenzel uses a small volume of air at moderate pressure (the tongue can only generate limited force), while Valsalva uses the entire lung volume at potentially very high pressure (your chest muscles can generate pressures high enough to damage the middle ear structures). This lower-pressure approach significantly reduces the risk of Eustachian tube tissue damage and round window rupture that aggressive Valsalva attempts can cause when the tubes are partially blocked.

The Toynbee Maneuver

The Toynbee maneuver opens the Eustachian tubes by swallowing with the nose pinched closed. Swallowing activates the muscles that surround and dilate the Eustachian tubes — the same natural mechanism that clears your ears during takeoff and landing in an aircraft without any conscious effort. With the nose pinched, swallowing creates a brief negative pressure in the nasopharynx that actively pulls the Eustachian tubes open, allowing ambient pressure equalization between the middle ear and the surrounding water pressure. Toynbee works well for gradual, controlled descents and mild pressure differentials but may not generate enough equalization force for rapid descents or when nasal congestion partially blocks the tube openings. Many experienced divers use Toynbee during slow, feet-first descents and switch to Frenzel when the pressure differential increases and requires more active equalization force to overcome.

Voluntary Tubal Opening (BTV)

The most advanced equalization technique is voluntary tubal opening (BTV — from the French Béance Tubaire Volontaire) — the ability to consciously open the Eustachian tubes without swallowing, jaw movement, or nose pinching. This skill, which some people possess naturally and others can develop through dedicated practice, allows continuous hands-free equalization during descent — the ultimate equalization method because it eliminates all the procedural steps (nose pinching, tongue positioning, swallowing) that require attention and hand use during descent when those hands might be needed for other tasks. Teaching BTV is beyond the scope of a written guide — it requires kinesthetic awareness of the tensor veli palatini and levator veli palatini muscles that control the Eustachian tubes, and most people need coached practice over multiple sessions to identify and activate these muscles voluntarily. If you struggle with equalization despite mastering Frenzel and Toynbee, consider working with a diving medicine specialist or freediving equalization coach who can help you develop BTV capability through structured exercises.

The Jaw Thrust and Combined Techniques

The jaw thrust — pushing the lower jaw forward and slightly downward — physically opens the Eustachian tube openings by pulling on the tissue surrounding the tube exits in the nasopharynx. Many divers use jaw thrust as a supplement to other techniques rather than as a standalone method — combining jaw thrust with Frenzel or Toynbee increases the effectiveness of the primary technique by mechanically widening the tube openings before the pressurization or swallowing force is applied. The combined approach (jaw thrust plus Frenzel) is particularly effective for divers who experience difficulty equalizing during the first ten to fifteen feet of descent where the pressure change per foot of depth is greatest and the Eustachian tubes must open against the maximum relative pressure differential of the entire descent.

When to Abort a Descent

The non-negotiable rule of ear equalization is that descent stops the moment equalization stops working. If you cannot equalize at any point during your descent — if Valsalva, Frenzel, Toynbee, jaw thrust, and every combination you know all fail to produce the pressure relief in one or both ears — you must stop descending immediately, ascend a few feet to reduce the pressure differential across the eardrum, and try again from the reduced depth. If equalization does not succeed after ascending and retrying two or three times, abort the dive entirely. Continuing to descend against a pressure differential causes middle ear barotrauma — the eardrum stretches painfully inward, blood vessels in the middle ear rupture and fill the middle ear space with blood, the round window membrane can tear (creating a perilymph fistula that causes vertigo and potential permanent hearing damage), and in severe cases, the eardrum itself ruptures. None of these injuries is worth the dive, and all of them can be prevented by following the simple rule of stopping when equalization stops.

Equalize early and often — begin gentle equalization at the surface before descent starts, and equalize every two to three feet during the first twenty feet of descent where the pressure change per unit depth is greatest. If you wait until you feel pressure discomfort or pain, the Eustachian tubes are already compressed by the pressure differential and are physically harder to open — you are fighting against the pressure rather than managing it proactively. The divers who equalize most easily and most consistently are the ones who start earliest and equalize most frequently during the critical first moments of every descent.

Pre-Dive Equalization Preparation

Several pre-dive practices improve equalization success during the dive. Avoid dairy products and heavy foods in the hours before diving — these increase mucus production in some individuals, and excess mucus in the nasopharynx and Eustachian tube openings creates a physical barrier to equalization that no technique can overcome efficiently. Stay hydrated — dehydration thickens mucus membranes and increases the effort required to open the Eustachian tubes. Avoid decongestant medications unless specifically recommended by a diving medicine physician — while decongestants temporarily shrink swollen nasal and Eustachian tube tissues and make equalization easier during descent, they wear off at unpredictable times. If a decongestant wears off during a dive, the tissues re-swell at depth and can trap air in the middle ear that cannot be released during ascent, causing reverse squeeze barotrauma that is painful and potentially more dangerous than the descent equalization problem the medication was intended to solve.

Gentle pre-dive equalization exercises (performing Frenzel maneuvers on the surface before entering the water, jaw stretching exercises, and gentle Toynbee swallows) warm up the muscles and tissues surrounding the Eustachian tubes and help ensure the tubes are open and functioning before you begin the descent where equalization failure has consequences. Think of pre-dive equalization exercises as stretching before a run — they prepare the relevant musculature for the demands of the activity and reduce the risk of injury from cold starts.