Huawei FreeBuds 4i true wireless ANC earphones NEWS

By cloudatlas / Apr 08, 2021

Huawei FreeBuds 4i true wireless ANC earphones NEWS

Huawei freebuds, new TWS products

At the beginning of the new year of 2021, Huawei released this year's new TWS product-Huawei FreeBuds 4i. Previously, we conducted a detailed experience evaluation on it, and compare the size of the headset/ charging box. Both Huawei FreeBuds 3 and FreeBuds Pro are small and portable; the active noise reduction function can significantly reduce the low frequency noise often encountered in life scenes, and the noise reduction experience is more comfortable, and it also supports the ambient sound transmission mode.

huawei freebuds

 

 

 

 

Noise-cancelling system

In terms of noise reduction capability for uplink calls, Huawei FreeBuds 4i uses a unique wind-proof structure at the microphone inlet position, which can suppress wind noise to a certain extent. At the same time, it also supports call noise reduction algorithms to make the call voice clear; in music mode, The headset has a single battery life of 7.5 hours when the noise reduction turn on, and it reaches 10 hours when the noise reduction mode is turned off. Such a long battery life is the only gear of Huawei's true wireless headset products.

 

Although the Huawei FreeBuds 4i wireless headset uses a combination of numbers and letters in the naming method, it is not a flagship series of pure numbers or letters, but the configuration and actual use experience of this product are better, and the price is more affordable. Huawei thinks It is necessary to push the whole people into the era of wireless headsets through this product.

 

The Huawei true wireless products that I have disassembled before are: Huawei FreeBuds Pro true wireless noise reduction headphones, Huawei FreeBuds 3 true wireless headphones, Huawei FreeBuds Yuexiang version wireless headphones, Huawei FreeBuds 2 Pro true wireless Bluetooth headphones, Huawei FreeBuds True wireless Bluetooth headset.

 

The charging box of Huawei FreeBuds 4i wireless earphones adopts a pebbles shape. The earphones are use handle-in-ear design. The surface of the shell treate with piano paint to enhance the sense of quality; the size of the earphones and charging box is smaller than  FreeBuds Pro , Comfortable to wear and more portable.

More TWS diversity

Huawei did not officially advertise the waterproof capability of this product, but during the disassembly process, I found that Huawei FreeBuds 4i headset and charging box have perfect waterproof measures, and the details are no less than the flagship product: charging box The buttons, charging ports, indicator lights and charging cockpit have corresponding dust-proof and waterproof designs; there are a large amount of sealing glue at the joints of the front cavity of the earphone, charging contacts, and microphone pickup holes to improve the airtightness and waterproof ability at the same time, It also adds difficulty to production and testing.

 

In terms of internal circuits, the charging box inputs power through the USB Type-C interface. Weir Semiconductor’s TVS design to input overvoltage protection. The battery charge and discharge management circuit uses more customized chips. Yutai ETA1061 is responsible for boosting the battery output to charge the earphones. , and Zhaoyi's innovative MCU is use in the function control of the charging box; the soft-pack battery capacity is 215mAh. There is a plastic middle frame in the charging box to fix the internal circuit, which plays a role of structural strengthening, which correspondingly affects the size of the battery and the addition of the wireless charging module. The latter may also be the reason for product positioning.

More different in huawei freebuds

For earphone part, the main chip of Huawei FreeBuds 4i is Hengxuan BES2500Z, which supports ANC and environmental sound transmission; the ANC of the earphone adopts the feedforward noise reduction scheme, and the MIC noise reduction uses dual microphone beams. The forming technology, the location of the pickup hole and the structural design are unique to reduce wind noise; the headset transmits Bluetooth signals through the on-board antenna; and the capacitive in-ear detection and touch 2 in 1 solution are from Goodix Technology. The button battery capacity is 55mAh.

 

From the perspective of disassembly,  FreeBuds 4i headset and the fixed through FPC, BTB, can be improve production efficiency; the internal space of the headset and the charging box is compact, and the overall structure design is good. .

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