With the increasing aging of the population and the problems caused by noise hearing impairment caused by multiculturalism, hearing loss is gradually becoming an increasingly serious health problem in contemporary society, which not only affects the social and communication skills of individuals, but also may lead to mental health problems. As a brand focusing on family health, Zdeer has launched a variety of hearing aid products for people with hearing loss, helping users live and work better with humanized design and convenient user experience.
Zdeer Left Point In-Ear Hearing Aid ZD-ZT6N is a product suitable for people with hearing loss below 80dB, which adopts a design similar to TWS earphones, equipped with a charging case to provide convenient storage and charging, the hearing aid is equipped with a 24-channel digital compensation scheme, based on WDRC dynamic range compression technology, subdivides multiple audio sources and automatically calculates hearing compensation in different frequency bands, providing a better listening experience, and supports AI adaptive scene recognition, through AI environmental noise cancellation technology, clearly recording the sound sources required by users。
ZD-ZT6N is equipped with a moving iron horn to provide higher sound resolution and bring better vocal performance; it supports automatic acoustic noise suppression technology to avoid damage to human ears caused by sudden loud noises; it supports 4 levels of volume adjustment, and 3 noise reduction modes of general, noise reduction and strong noise reduction to meet the needs of different scenarios; it also supports Bluetooth 5.3, which can be connected to mobile phone devices to watch TV, listen to music, and answer calls.
In terms of fitting, the Left Point In-Ear Hearing Aid supports App self-fitting, and users can use the Left Point Voice App to fit online, edit the audiogram or import offline data, and the algorithm will make personalized audio frequency compensation for the user's left and right ears, and also has a remote fitting 1-to-1 service to provide users with professional guidance. Let's take a detailed look at this product and the internal scheme~
一、Zdeer左点耳内式助听器ZD-ZT6N开箱
The left dot in-the-ear hearing aid ZD-ZT6N is beautifully packaged, and the paper tote bag design is simple, concise and environmentally friendly, with the brand LOGO printed on it, as well as the brand Slogan of "science and technology, medical care, healthy life".
The inner packaging box is orange and red, and the front is designed with the brand LOGO and product name, which introduces the scope of application: suitable for hearing compensation for patients with air-conductive hearing loss.
The factory label is affixed on the back of the box, which introduces some products and manufacturer information. Model: ZD-ZT6N, manufacturer: left point (Hunan) Technology Co., Ltd., medical device registration certificate number: Hunan machinery note 20212191653.
The side of the box is designed with the brand positioning of "Left Point Focus on Family Health".
Inside the box is a left-point in-the-ear hearing aid, charging cable, instruction manual and quick use guide, while the paper tote bag comes with a storage box, anti-loss cord and hanging loop.
The hearing aid storage box is made of wear-resistant fabric on the outside and printed with the "Left Point" brand LOGO.
The interior is made of cotton wool to prevent scratches on the product, and it is designed with a net pocket to fix it.
The hearing aid anti-loss cord has a keychain connection loop at one end and a clothespin at the other end to fix it with the clothing. Used to prevent hearing aids from being lost when not in use.
Three sizes of silicone hanging rings, the large round is attached to the hearing aid, and the small circle is connected to the anti-loss cord.
Two pairs of silicone ear tips of different sizes, one pre-installed on the hearing aid, a total of three sizes, the user can freely change according to the size of the ear.
充电盒充电线，采用了USB-A to Type-C接口。
The left-point in-the-ear hearing aid ZD-ZT6N charging case adopts a rounded square design, smooth and rounded paint texture, the front is designed with a chamfer that is easy to open the lid, and an indicator light on the body is used to feedback the charging status.
The back of the charging case has a silver hinge design, and the back is also the wireless charging receiving area.
A Type-C charging port is set at the bottom of the charging case.
Open the lid of the charging case, and the internal hearing aid is magnetically fixed for easy access and placement.
Take out the headphones and get a look at the interior of the cockpit.
Close-up of a metal ejector pin charging a hearing aid.
The overall appearance of the ZD-ZT6N ZD-ZT6N is very simple and pure.
The left point in-the-ear hearing aid adopts a bean-style design, which is no different from the appearance of TWS earphones, with white color and lacquer texture, which is simple and fashionable to wear, avoiding labeling.
The exterior of the hearing aid is at a glance, with a touch area on the back and a microphone for voice pickup.
Close-up of the microphone on the back of the hearing aid, protected by an internal dust filter.
The inside of the hearing aid is at a glance, and it is designed with L/R left and right logos for easy user identification.
Close-up of the metal contacts connected to the charging case for charging.
Remove the earbuds and get a close-up of the hearing aid's sound port.
According to the actual measurement of I love audio network, the Zdeer left-point in-ear hearing aid ZD-ZT6N weighs only 56.7g.
Weighing only 4.3g, the hearing aid is light and comfortable to wear.
我爱音频网采用CHARGERLAB POWER-Z KM003C对Zdeer左点耳内式助听器ZD-ZT6N进行充电测试,输入功率约为1.53W。
二、Zdeer左点耳内式助听器ZD-ZT6N拆解
Through unboxing, we learned in detail about the simple and fashionable design of Zdeer's left-point in-the-ear hearing aid ZD-ZT6N, and then enter the disassembly part to see the internal structure and hardware configuration information~
Disassemble the charging case
Disassemble the charging case shell and take out the hearing aid cockpit structure and battery cell.
The inner structure of the shell is at a glance, and it is designed with structural reinforcement to improve the anti-drop performance.
A glance at the front structure of the hearing aid cockpit, which is fixed with a motherboard unit.
A glance at the structure of the rear of the cockpit, with a wireless charging receiver coil.
The bottom of the cockpit is screwed to secure the USB-C power input board.
Remove all components secured to the cockpit.
The cockpit has an overview of the underfloor structure, with four magnets holding the hearing aid and the charging case lid in place, and the red wires are thermistors that detect the temperature of the battery.
A list of circuits on one side of the motherboard of the charging case.
A list of circuits on the other side of the motherboard of the charging case.
The Pogo Pin connector for charging hearing aids in the charging case.
The motherboard is connected to the connector pins of the USB-C power input board.
Siyuan Semiconductor SY7100 is a high-efficiency, fully integrated WPC Qi V1.24 compliant wireless charging receiver IC, supporting a maximum output power of 5W, built-in low-impedance synchronous rectifier, with an efficiency of up to 94%, integrated LDO, adjustable output voltage. The SY7100 also includes a digital controller that calculates the power received by the mobile device. The controller transmits this information to the transmitter for foreign object detection (FOD) and improved wireless charging.
Inside the SY7100 is an 8-bit MCU core, 256 bytes of RAM, and 8K bytes of ROM storage for repeatable rewritable. The integrated multi-channel 12-bit SAR ADC can be used for application functions such as voltage, current, and NTC temperature sensing. In addition, the SY7100's internal timer, UART, I2C controller, and PWM functions facilitate the use of other peripheral device designs.
SY7100 with the SY880X/881X/882X series of charging bin SOC chips that have been mass-produced, Siyuan Semiconductor provides customers with a complete TWS earphone charging case system solution with wireless charging function, simplifying the complexity of customer project design and development, and improving the efficiency from project development to product launch!
据我爱音频网拆解了解到，思远半导体的电源管理类芯片目前已被一加、小米、OPPO、Redmi、iQOO、漫步者、联想、传音、倍思、科大讯飞、用维、公牛、小天才、Cleer、Fiio、JadeAudio翡声、MEES、YOBYBO、HAYLOU、DENON天龙、Oladance、Nothing、XTOUR、final、酷睿视、Skullcandy、vivo、QCY、猛玛、声阔、绿联、Nothing、realme、魅族、百度、网易、JBL、哈曼、联想、万魔、233621、传音、魔宴、创新科技等国内外知名品牌采用。
Siyuan Semiconductor's SY8815 Bluetooth headset charging bin solution is specially designed for Bluetooth headset bin, with integrated charging module and discharge module inside. The SY8815 charge current is externally adjustable, and the discharge module integrates two output current limit switches, providing independent load presence detection and load insertion detection, and supporting output current detection.
SY8815 discharge enable control, the MCU can directly control the discharge function of the chip through EN. SY8815 integrates a single-line status code output, which is convenient for the chip to report the chip status to the MCU. SY8815 is very suitable for the design of Bluetooth headset charging case, greatly simplifying the peripheral circuits and components, and providing a simple and easy-to-use solution for the application of Bluetooth headset charging case.
Siyuan Semiconductor SY8815 detailed data map.
A 2.2μF power inductor that works with a power management chip.
Close-up of the LED indicator used to feedback the charging status.
Close-up of the wire socket connected to the battery.
A list of circuits on one side of the USB-C power input board.
A list of circuits on the other side of the USB-C power input board.
Close-up of USB-C charging receptacle.
Close-up of the connector socket connected to the motherboard.
Close-up of the wireless charging receiver coil, mounted on a magnetically shielded sticker.
Charging case built-in lithium battery Model: YJ702030, nominal voltage: 3.7V, rated capacity: 400mAh 1.48Wh, from YJ Yanjiu Electronics.
Close-up of the connector plug where the battery wire connects to the motherboard.
Tear off the external insulation protection, and the circuit on one side of the battery protection board is listed, and a lithium battery protection IC and MOS tube are installed, which are responsible for the protection of the battery from overcharge, overdischarge, and overcurrent.
A list of circuits on the other side of the battery protection board.
Silk screen DW01 lithium battery protection IC.
Silk screen 8205A MOS tube.
Hearing aid disassembly
Remove the hearing aid back cover along the clamping line.
The inner structure of the cover plate is at a glance, equipped with a Bluetooth antenna and a touch detection patch, and the microphone pickup hole is protected by a wire mesh.
Close-up of Bluetooth antenna and touch detection patch, silkscreen model "SN0886-V1", exposed copper connected to the motherboard.
The main board inside the cavity is fixed by screws, and the upper microphone is provided with a sealing cover to improve the sound effect.
Remove the screws and remove the motherboard and battery cells.
The internal structure of the cavity is at a glance, the lower wire is connected to the speaker, glued and sealed, and the upper magnet is used for adsorption and fixation with the charging case.
The hearing aid has a built-in steel case button battery, which is protected by a high-temperature insulating tape.
Close-up of the negative electrode of the battery.
A glance at the circuitry on one side of the hearing aid motherboard.
A list of circuits on the other side of the hearing aid motherboard.
Close-up of the metal copper pillar connected to the charging case for charging.
PXI PixArt PAU1806FB Bluetooth audio SoC is a Bluetooth headset single-chip solution with built-in assistive listening/assistive listening algorithms, which supports dual-receiver and dual-transmission, low-latency game mode, TX+RX ultra-low latency, ENC, ANC noise reduction, transparency mode and other rich functions.
Close-up of the crystal oscillator that provides the clock for the Bluetooth chip.
A Pogo Pin connector that connects a Bluetooth antenna and a touch detection patch.
Touch detection IC of silkscreen 2F.
Close-up of two precision wire-wound inductors powering the internal circuitry of the Bluetooth chip.
The MEMS microphone of the iA051 2134 is used to pick up the external sound, which comes from Yixin Microelectronics.
Silk screen 2o A3 lithium battery protection IC, responsible for battery charge and discharge protection.
Remove the speaker inside the cavity and peel off the battery insulation protection.
Take out the speaker and get a look at the internal structure of the sound cavity.
The hearing aid speaker uses a moving iron unit, the radium engraving model "10021", from BELLSING.
Close-up of the back of the moving iron unit.
Close-up of the sound hole of the moving iron unit.
The steel case button battery built into the hearing aid model: LIR1040, nominal voltage: 3.6V, also from YANJOO Yanjiu Electronics.
Close-up of the back of the battery.
Zdeer左点耳内式助听器ZD-ZT6N拆解全家福。
3. I love the audio network summary
Zdeer's left-point in-the-ear hearing aid ZD-ZT6N adopts the same design as the TWS earphones in terms of appearance. Bean-type hearing aids, small size, simple and fashionable to wear, while avoiding being labeled, so that people with hearing loss are more willing to use; round corners square charging box, piano paint process, excellent texture, portable to go out, for hearing aids to provide convenient charging.
In terms of the main internal configuration, the charging case has a built-in YJ Yanjiu electronic 400mAh lithium battery, which supports wired/wireless input power, and the wired adopts the Siyuan Semiconductor SY8815 Bluetooth headset charging bin solution, which integrates the charging module and the discharge module, and the wireless adopts the Siyuan Semiconductor SY7100 wireless charging receiving chip, which conforms to the WPC Qi V1.24 protocol, supports a maximum output power of 5W, and the efficiency is as high as 94%.
The hearing aid is equipped with a BELLSING double sound moving iron unit, built-in YJ Yanjiu Electronics 40mAh steel case button battery, PXI PixArt PAU1806FB Bluetooth audio SoC on the motherboard, built-in assistive listening/hearing aid patented algorithm, and supports rich functions, and is equipped with Yixin Microelectronics MEMS microphone to pick up external sounds.