The Portable LED Speaker combines 8W audio output, Bluetooth 5.3 connectivity, and colorful LED lighting in a stylish ABS plastic and fabric design. Supporting Bluetooth, TF card, USB, AUX, FM radio, and TWS connectivity, it offers versatile music playback for home entertainment, outdoor gatherings, travel, and everyday listening. Powered by a 1200mAh rechargeable battery with approximately 4–5 hours of playback, this multifunctional speaker is an ideal choice for retailers, wholesalers, and brands seeking competitive portable audio products. Jaskey Limited provides OEM/ODM customization services to support branding, product development, and wholesale cooperation.
Discover the latest wearable Bluetooth speaker designed for portable, hands-free listening. Featuring Bluetooth 5.4, a 4W speaker driver, clip-on design, TWS interconnection, hands-free calling, and USB-C charging, it offers a practical audio solution for outdoor activities, cycling, travel, and everyday use. With OEM/ODM and private label customization options, it is suitable for brands, distributors, retailers, and e-commerce sellers looking to expand their portable audio product ranges.
The Cube Bird Dancing Speaker is a creative Bluetooth speaker that combines a playful bird-inspired design with practical audio features. Equipped with Bluetooth 5.4, hands-free calling, TWS wireless connectivity and a 3W speaker, it delivers convenient wireless entertainment in a compact design. With up to 4 hours of working time, it is suitable for home, desktop use, parties and gift collections. Ideal for retailers, wholesalers and consumer electronics brands, this novelty speaker offers opportunities for product differentiation, seasonal promotions and OEM/ODM customization.
The 2-in-1 Bluetooth Speaker with TWS Earphones combines a portable wireless speaker and true wireless earbuds in one convenient design. Featuring Bluetooth 5.3, a 5W speaker, F13 copper ring earbud drivers, and a 10–15m transmission range, it offers flexible listening for home, office, travel, and everyday entertainment. The earbuds provide approximately 4–5 hours of playback, while the speaker delivers 2–3 hours of music. Made from ABS plastic and silicone, this versatile audio product is ideal for consumer electronics brands, retailers, and gift markets seeking innovative wireless audio solutions.
The Sport TWS Earphone features Bluetooth 5.4 connectivity, a compact charging case, and a lightweight ABS plastic design for convenient everyday wireless listening. With a transmission range of up to 10 meters, 2.5–4 hours of playback time, and a 200mAh charging case, it is suitable for commuting, leisure, and daily use. Jaskey Limited offers OEM/ODM cooperation opportunities for brands, wholesalers, importers, and retailers seeking reliable wireless audio products from an experienced China consumer electronics manufacturer.
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The China Waterproof Portable Bluetooth Speaker combines durable design with versatile audio performance for outdoor and everyday use. Featuring Bluetooth 5.3, hands-free calling, TWS connectivity, TF card and AUX support, it offers flexible listening options in a compact ABS and silicone design. With a 1800mAh battery and water-resistant construction, it is suitable for travel, camping, beach outings, and daily entertainment. Jaskey Limited provides OEM/ODM customization services for brands, distributors, and importers seeking reliable portable Bluetooth speaker solutions.
The WiFi Alexa Smart Speaker combines voice control, wireless audio, and smart home connectivity for convenient everyday living. Featuring support for Alexa skills, compatible Tuya smart home devices, multilingual interaction, and app-based control, it offers a practical solution for modern connected homes. With a compact design, 5W speaker output, and 2.4GHz WiFi connectivity, it is suitable for bedrooms, living rooms, and home office environments.
The Outdoor Speaker with Light combines portable audio and ambient lighting in a compact ABS plastic design. Featuring Bluetooth 5.0, USB and TF card playback, a 5W speaker, and a 1200mAh rechargeable battery, it offers versatile entertainment for outdoor activities, home gatherings, camping and travel. With 4–5 hours of working time and multiple playback options, this portable Bluetooth speaker is ideal for retailers, distributors and brands seeking differentiated audio products. OEM/ODM customization and private-label opportunities are available for global markets.
As the tws wireless earbuds sound source localization mechanism, the time difference has a high accuracy for the tws wireless earbuds sound source localization on the front and both sides, and the error is relatively large for the tws wireless earbuds sound source localization from the back. The reason is not very clear. It may be because the tws wireless earbuds sound comes from the back side, and the left or right ear will produce the ear shell shielding effect, which will cause the tws wireless earbuds sound to change the time difference due to diffraction.
Because the human ear is adaptable to tws wireless earbuds sound, when the tws wireless earbuds sound reaches the basement membrane, the hair cells are excited and sensitive. When the tws wireless earbuds sound is continuously stimulated, the response of the hair cells is relatively slow. Therefore, the tws wireless earbuds sound source localization accuracy of sudden tws wireless earbuds sound and transient sound is high.
A sound source that flows quickly will attract the attention of the auditory sense. Therefore, for sounds with changing positions, the human ear has less error in recognizing its position. This is the reason for the tws wireless earbuds sound shift in modern stereo programs. A continuous sound, although there is a time difference between reaching both ears, because the subsequent sound reaching the same ear masks the previous sound, the time difference becomes insignificant.
The propagation speed of high-frequency tws wireless earbuds sound and low-frequency tws wireless earbuds sound is the same, so the time difference has nothing to do with the frequency of the tws wireless earbuds sound source, but the phase difference is related to the frequency of the tws wireless earbuds sound source. When a tws wireless earbuds sound reaches both ears, there will be a time difference between the two ears, but also a phase difference. Within a certain frequency range, the phase difference is one of the information of the tws wireless earbuds sound source orientation.
The phase difference positioning mechanism is more effective when the frequency is lower. For example, the wavelength of 20Hz tws wireless earbuds sound at normal temperature is 17m, and 200Hz is 1.7m. The phase difference formed by the time difference can be felt by the human ear. When the tws wireless earbuds sound source is in the high-frequency region, for example, the wavelength of 10kHz is 85px, and the wavelength of 20kHz is 42.5px. The phase difference caused by the time difference even exceeds 360°, which is equal to starting another wavelength. The phase difference at this time has no effect as positioning information, because it can no longer be distinguished that the phase is lagging or leading. Therefore, high-frequency tws wireless earbuds sound belongs to "chaotic phase difference" information.
2. Poor sound level and tone color
The difference in tws wireless earbuds sound level means that the sound waves reach the two ears with different sound intensities. The main reason for the difference in sound level is the shielding effect. If the advancing sound wave encounters an obstacle with a geometric size equal to or greater than the tws wireless earbuds sound wavelength, a shielding effect will occur. The principle is: when high-frequency tws wireless earbuds sound propagates and encounters an obstacle, it cannot cross the obstacle and forms a sound shadow area behind the obstacle; the low-frequency sound has a wavelength greater than the obstacle and forms a sound diffraction area behind the obstacle. It is high-frequency sound that plays an important role in the difference in sound level. Because high-frequency sound waves cannot bypass the listener's head, the ear in the shadow area has a difference in sound intensity level than the ear that can hear the direct tws wireless earbuds sound. The higher the frequency, the greater the deviation of the sound source from the front central axis, and the more obvious the difference in sound level.
From the perspective of the diffraction effect, low-frequency sound will of course also form a sound level difference. However, because the head diameter is about 500px, when low-frequency sound is diffracted, the distance to travel is limited, and the energy lost due to diffraction is very small. Therefore, the low-frequency sound that deviates from the central axis, the tws wireless earbuds sound level difference between the two ears is almost zero. The sound source localization effect is not obvious.
While the masking effect has an effect on the tws wireless earbuds sound level difference, it will inevitably have an effect on the tone color difference. We know that the main components that make up a tone are the basic tws wireless earbuds sound and the harmonic components above it. For example, a composite wave point sound source with a fundamental frequency of 200 Hz and an incident angle of 45° will cause diffraction effects when its fundamental sound and low-order harmonics encounter head obstacles, and its high-order harmonics will be blocked by the head. Partly masked and high-frequency sound shadows appear. At this time, the tws wireless earbuds sound that reaches one ear is a direct sound (original tone), and the sound that reaches the other ear changes its tone due to high-frequency loss. The cerebral cortex recognizes the sound source location based on the tone color difference between the two ears. It can be seen that the tone color difference is another reflection of the high-frequency signal sound level difference.
It should be pointed out that the formation of tone color difference is mainly those composite sound sources whose fundamental frequency is above 60Hz. Because the higher harmonics of the tws wireless earbuds sound below 60Hz have a larger wavelength, it does not produce a shadowing effect when encountering obstacles of the head size (about 500px in diameter). For example, for a sound with a fundamental frequency of 30Hz, the 16th harmonic is 480Hz, and the wavelength is 0.716m. The wavelength is much larger than the diameter of the head. There will be no obvious tone color difference between the ears. The 17th, 18th, and 19th harmonics , The intensity is very weak, and it has little meaning to the tone composition. Therefore, sound below 60Hz has a lower accuracy of sound source orientation than mid-frequency and high-frequency sound.
