During this period, there will be many parts such as the lung bronchus, abdominal muscles, chest cavity, internal laryngeal muscles and external laryngeal muscles, and vocal cords to participate in the work.

This optimization has modified the structure of these parts from the inside out to make them more harmonious and more efficient.

Because of this, he can also make sounds with greater power and higher vibration frequency.

"My current limit..."

Lu Lianxiao has ten-point tone accuracy, and controls the frequency of sound far better than ordinary people.

As he let out a low moan, a sharp sound gradually came out and became more and more harsh. When this harsh feeling reached its limit and even caused some discomfort, the sound disappeared.

but……

This is not really disappearing.

Instead, it goes beyond what human hearing can capture.

His voice entered the ultrasound field.

In his "eyes", he could clearly "see" the circles of sound waves spread at a speed visible to the naked eye.

Although he was able to "see" the transmission of sound waves in the past, these sound waves died quickly in the air due to insufficient frequency. Many times, he could only use solids, such as the ground, furniture, walls, etc. to conduct sound wave detection.

But now...

His sound waves directly reached dozens of meters away.

"It's still a bit bad, the sound transmission efficiency in the air is too poor."

Lu Lianxiao's voice was closed.

His voice had just entered the ultrasound field, with a low frequency and limited propagation range, only more than 30 meters.

Of course, he can increase the propagation distance by increasing the power, but this requires a lot of pitch.

The ten-point sound is not enough.

Just like an ordinary person can control the sound of his or her speaking, but he or she cannot accurately control which frequency the sound is at.

Previously, he could accurately control the tone, but when his range was further strengthened to ten, the requirements for pitch were significantly improved.

"The transmission distance is limited, but the penetrating wall of ultrasonic waves cannot be held back. In other words, the interference effect of the building's masking on me has been reduced by a large part."

Some animals can use ultrasonic detection, and Lu Lianxiao can do this now.

However, the level is currently limited and can only be used in specific occasions. Most of the time, this ability is not as good as looking directly at the naked eye.

"The effect of external use is average, and it can be internal..."

Lu Lianxiao relied on his own sound and let out a gentle whisper.

Suddenly, clearly visible sound waves penetrated towards his body, and through the surveying and mapping method he had been learning over the years, the ultrasound contrast method gradually condensed into an image in his mind according to time.

Just like...

A-super.

“It’s possible.”

Lu Lianxiao's expression was filled with a hint of turmoil.

Next...

This is how to use this method to practice.
Chapter completed!