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US 2026/0304029 A1Published application
Acoustic output devices
AssigneeShenzhen Shokz Co., Ltd.
InventorsZhen WANG, Lei ZHANG
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Abstract
The embodiments of the present disclosure provide an acoustic output device including a sound emitting part. The sound emitting part may include at least one acoustic driver, and a first chamber, and a second chamber acoustically coupled to the at least one acoustic driver. The first chamber may have at least one first sound outlet, and the second chamber has at least one second sound outlet. The at least one acoustic driver may radiate sounds to an external environment through the at least one first sound outlet and the at least one second sound outlet. In at least a portion of a low-frequency range, the sounds emitted by the sound emitting part towards a far field may exhibit directivity.
Claims20
An acoustic output device, comprising:
- a sound emitting part including:
- at least one acoustic driver;
- a first chamber and a second chamber acoustically coupled to the at least one acoustic driver, the first chamber having one first sound outlet and the second chamber having one second sound outlet, and the at least one acoustic driver radiating a first sound to the outside through the first sound outlet and a second sound to the outside through the second sound outlet, wherein
- in at least a portion of a low-frequency range, the sounds emitted by the sound emitting part towards a far field exhibit directivity, the directivity is characterized by the sounds radiated from the first sound outlet and the second sound outlet having a sound pressure difference of at least 3 dB in at least one pair of opposite directions, wherein a phase difference between the first sound and the second sound is in a range of 120° to 179°;
- the low-frequency range is a range of frequencies below 1000 Hz;
- the sound pressure difference in at least one pair of opposite directions is tested by:
- setting a pair of measurement positions in opposite directions of the acoustic output device, wherein each measurement position is disposed at an identical measurement distance from a midpoint of a line connecting an acoustic center of the first sound outlet and an acoustic center of the second sound outlet, and the identical measurement distance is not less than 20 cm;
- acquiring two sound pressures by a sound acquisition device that is disposed at each of the pair of measurement positions, and a difference between the two sound pressures being calculated as the sound pressure difference in the at least one pair of opposite directions;
- the phase difference is tested by:
- setting a barrier to separate the first sound outlet and the second sound outlet, and measuring a phase of the first sound radiated from the first sound outlet and a phase of the second sound radiated from the second sound outlet, respectively;
- wherein a distance between a first measurement position for measuring the phase of the first sound and a geometric center of the first sound outlet is within 10 mm, and a distance between a second measurement position for measuring the phase of the second sound and a geometric center of the second sound outlet is within 10 mm;
- calculating the phase difference between the phase of the first sound radiated from the first sound outlet and the phase of the second sound radiated from the second sound outlet.
9 more elements
An acoustic output device comprising:
- a sound emitting part including:
- at least one acoustic driver;
- a first chamber and a second chamber acoustically coupled to the at least one acoustic driver, the first chamber having one first sound outlet and the second chamber having one second sound outlet, wherein the at least one acoustic driver radiates a first sound to the outside through the first chamber and the first sound outlet, and radiates a second sound to the outside through the second chamber and the second sound outlet, at 1000 Hz, a phase difference between the first sound and the second sound is in a range of 125° to 178°;
- the phase difference is tested by:
- setting a barrier to separate the first sound outlet and the second sound outlet, and measuring a phase of the first sound radiated from the first sound outlet and a phase of the second sound radiated from the second sound outlet, respectively;
- wherein a distance between a first measurement position for measuring the phase of the first sound and a geometric center of the first sound outlet is within 10 mm, and a distance between a second measurement position for measuring the phase of the second sound and a geometric center of the second sound outlet is within 10 mm;
- calculating the phase difference between the phase of the first sound radiated from the first sound outlet and the phase of the second sound radiated from the second sound outlet.
4 more elements
Dependencies are inferred from the claim text.