# US 12,225,346 B2 · Multiple-driver adapter having plane wave equalizer

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 12,225,346 B2
- Document ID: US12225346B2
- Status: Granted
- Kind: B2
- Application number: 18/020,630
- Filed: 2023-01-31
- Published: 2024-08-22
- Granted: 2025-02-11
- Earliest claimed: 2023-01-31
- Applicants: Jong Bae Lee
- Inventors: Jong Bae Lee
- Web page: https://patentgrep.com/patent/US12225346B2

## CPC

- H04R 1/30: Combinations of transducers with horns, e.g. with mechanical matching means {, i.e. front-loaded horns}(horns in general G10K; {transducer enclosures or mountings using a back-loaded horn H04R1/2861; application of horns as guiding means to obtain a predetermined directivity characteristic H04R1/345})
- H04R 1/2811: {for loudspeaker transducers}
- H04R 1/345: {for loudspeakers}
- H04R 2201/34: Directing or guiding sound by means of a phase plug
- H04R: LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS (producing sounds with frequency not determined by supply frequency G10K)

## Abstract

A multiple-driver adapter having a plane wave equalizer according to the present invention may include: a cube body; a high-pitched driver provided on one surface of the cube body and a medium-pitched driver provided on the other surface; a horn unit vertically disposed in the high-pitched driver and the medium-pitched driver, and partially disposed at output units of the high-pitched and medium-pitched drivers, and having a fore end exposed to one surface of the cube body; and at least one equalizer provided in the cube body and reducing sound interference.

## Claims

### Claim 1

A multiple-driver adapter having a plane wave equalizer, comprising:
a cube body;
a high-pitched driver provided on one surface of the cube body and a medium-pitched driver provided on the other surface;
a horn unit vertically disposed in the high-pitched driver and the medium-pitched driver, and partially disposed at output units of the high-pitched and medium-pitched drivers, and having a fore end exposed to one surface of the cube body; and
at least one equalizer provided in the cube body and reducing sound interference.

### Claim 2 (depends on 1)

The multiple-driver adapter having a plane wave equalizer of claim 1, wherein the equalizer is provided in each of the high-pitched driver, the medium-pitched driver, and the horn unit.

### Claim 3 (depends on 2)

The multiple-driver adapter having a plane wave equalizer of claim 2, wherein the equalizer includes
a main equalizer provided in the horn unit,
a first sub-equalizer provided at the center of the high-pitched driver, and
a second sub-equalizer provided at the center of the medium-pitched driver.

### Claim 4 (depends on 3)

The multiple-driver adapter having a plane wave equalizer of claim 3, wherein the first sub-equalizer and the second sub-equalizer are provided to face each other in a central direction of the cube body, and
the main equalizer is provided to vertically intersect with the first and second sub-equalizers, and disposed in an outer direction of the cube body.

### Claim 5 (depends on 3)

The multiple-driver adapter having a plane wave equalizer of claim 3, wherein a shortest distance from a frontmost end of the first sub-equalizer to the main equalizer is relatively shorter than a shortest distance from the frontmost end of the second sub-equalizer to the main equalizer.

### Claim 6 (depends on 3)

The multiple-driver adapter having a plane wave equalizer of claim 3, wherein inner diameters of a tube expansion unit and a communication hole of the high-pitched driver are relatively smaller than inner diameters of the tube expansion unit and the communication hole of the medium-pitched driver.

### Claim 7 (depends on 3)

The multiple-driver adapter having a plane wave equalizer of claim 3, wherein an inclination angle of the tube expansion unit of the high-pitched driver is gentler than an inclination angle of the medium-pitched driver.

### Claim 8 (depends on 3)

The multiple-driver adapter having a plane wave equalizer of claim 3, wherein the main equalizer, and the first and second sub-equalizers are provided in a conical shape.