What are the characteristics of the inverter box?
The inverted box is currently the most commonly used sound box. It adds a carrier tube (inverted tube) on the basis of the closed box. ) Leading to the outside of the box. When the diaphragm of the horn unit moves, on the one hand, it directly radiates sound waves to the outside, and on the other hand, it compresses (or expands) the air in the box. The control air in the box is discharged from the inverted port, so that the inverted port becomes the "second diaphragm" that instigates the air. If the design is clever, the inverted tube-box system can just make the diaphragm backward The radiated sound waves are inverted by 180 degrees (the inverter box is therefore named), so that the sound waves radiated from the opening are in phase with the sound waves radiated in front of the diaphragm, and the same-phase radiation causes the sound energy to be superimposed, so it is strengthened and extended This improves the overall low-frequency response of the speaker. The inverted box and airtight use the backward radiation energy of the diaphragm, so the efficiency is relatively high. However, the inverted box is not perfect. In addition to the design and debugging more difficult than the closed box, the rapid air flow at the opening is likely to cause airflow noise. In addition, the phase inversion is essentially achieved by using acoustic resonance, so the transient response of the acoustic wave radiated by the opening is relatively poor.
