Bone conduction headphones believe that everyone is more or less in contact, and by converting the electrical signal into the mechanical vibration of the bone conduction oscillator, and then transmitting the sound through the skull to the auditory nerve, it realizes a different way of hearing from traditional air conduction. The bone conduction speaker is a similar sound generating unit, and the bone conduction oscillator is attached to the medium plane when used, and the sound amplification effect is achieved through the vibration contact surface, and different media can also present different timbres, so it brings more playability.
The bocoice hummingbirdPro bone conduction Bluetooth speaker that will be disassembled this time has a very small appearance, and is equipped with a large-size bone conduction unit on the configuration, and supports magnetic function, which can be easily fixed on range hoods, refrigerators, washing machines and other iron items, with magnetic patches, it can also be fixed on thin and light non-ferrous items to make sound. The larger the medium, the thinner and lighter it is, the better the sound and the louder the volume.
bocoice Hummingbird Pro bone conduction Bluetooth speaker supports Bluetooth 5.0, suitable for mobile phones, tablets, computers, switches and other audio source devices, and also supports simultaneous playback of multiple speakers; Equipped with neon lighting effects to enhance the music atmosphere; Built-in microphone for voice calls. In terms of battery life, it can provide 4-6 hours of music playback. Let's take a look at the detailed teardown report of this product~
1. Bocoice Hummingbird Pro bone conduction Bluetooth speaker unboxing
The bocoice hummingbird Pro bone conduction Bluetooth speaker packaging box is small in size and adopts the structure of heaven and earth cover. The product name is designed on the top of the box.
Product specifications and packing list are described on the back of the box. Bluetooth version: 5.0, A2DP, HFP: support TWS stereo mode, support multi-speaker (CSB broadcast) mode, up to 100 speakers play at the same time, bone conduction transducer power: 4 watts (maximum); Built-in music ambient lighting; Playback frequency range: 100Hz~18kHz; Built-in high-sensitivity microphone; Built-in polymer lithium battery: capacity 450mAh.
The opening of the side of the box is labeled with an anti-counterfeiting and anti-tamper label.
The contents of the box include the main unit, nano adhesive stickers, lanyards, charging cables, magnetic suction sheets, silicone suction boxes and manuals.
Speaker lanyard for added portability.
Nano stickers, magnetic tablets and silicone suction boxes are used to fix the speaker on different items.
音箱充电线，采用了USB-A to Type-C接口。
bocoice hummingbird Pro bone conduction Bluetooth speaker appearance at a glance, using a cylindrical design similar to "gyro", translucent body, external silicone decorative sleeve design brand LOGO.
bocoice hummingbird Pro bone conduction bluetooth speaker and I love audio network business card size comparison, the size is very small and portable.
The back of the fuselage is equipped with a Type-C charging port.
At the top of the fuselage is a metal knob button for power switch, volume adjustment, Bluetooth pairing and other function control. Decorated with a CD texture, the edges are glossy and chamfered, very delicate.
A bone conduction unit is set at the bottom of the fuselage, which has a magnetic suction function and is fixed on the medium to emit sound.
Close-up of speaker lanyard holes.
Measured by the I love audio network,bocoice hummingbirdProBone conduction Bluetooth speaker weighs about56.5g。
I love audio network uses CHARGERLAB POWER-Z KM002C to charge the bocoice hummingbird Pro bone conduction Bluetooth speaker, and the input power is about 2.37W.
2. Bocoice Hummingbird Pro bone conduction Bluetooth speaker disassembly
Remove the exterior trim sleeve and you can see that the speaker has a translucent design to display the ambient lighting for the music.
Remove the knob button at the top.
Close-up of the inside of the knob button, which is equipped with a sponge cushion.
Underneath the knob buttons, four fixing screws are hidden.
Remove the screws, open the cover, the inside of the cover is fixed with a pickup microphone, and the wire is soldered to the motherboard.
The internal structure of the cavity is at a glance, and the upper layer is fixed with the main board unit.
Remove the microphone and remove the cover.
A list of the inner structure of the cover.
Take out the motherboard unit and set the battery underneath.
Take out the battery and solder the battery wires with the motherboard.
The bottom structure of the cavity is at a glance, isolated from the bone conduction unit, and the wire is glued and sealed through the holes.
Remove the bottom cover of the speaker, and the bone conduction unit structure can be seen.
Disconnect the leads and remove the bone conduction unit.
Close-up of the back of the bone conduction unit, which pushes the medium to amplify sound by converting electrical signals into mechanical vibrations.
Close-up of the back of the bone conduction unit, with double-sided tape pads for fixation and cushioning.
Bone conduction unit vs. dollar coin size.
According to the measurement of the bone conduction unit, the diameter of the bone conduction unit is about 28.33mm.
The built-in lithium battery of the speaker is protected by insulating tape, with label information, model: ZLY 702035, rated capacity: 450mAh 1.665Wh, nominal voltage: 3.7V.
Tear off the outer insulation protection, and list the circuit on one side of the battery protection board.
A list of circuits on the other side of the battery protection board.
The screen printing DW01AQ's lithium battery protection IC is responsible for the protection of battery overcharge, overdischarge, and overcurrent.
Silk screen 8205A MOS tube.
A list of circuits on one side of the speaker motherboard.
A glance at the circuit on the other side of the speaker motherboard.
Close-up of the Type-C charging socket, equipped with a rubber ring to prevent dust and water.
Close-up of the rotary encoder with support for rotation and press control.
The Heroic HT8313 Class D audio power amplifier can continuously output 5.5W of power under VBAT=5V, THD+N=10%, and 4Ω load. The supply voltage of this Class D amplifier is provided by a built-in adaptive charge pump boost module. The boost module does not boost at low power, which can effectively increase the playback time of the battery.
The HT8313 supports Anti-Clipping Distortion (ACF) output control, which significantly improves sound quality, creates a very comfortable listening experience, and protects the speaker from overload damage. The HT8313 also has a free switching function between Class AB and Class D, integrated filter-free digital modulation technology, integrated output over-current protection, on-chip over-temperature protection, and power supply under-voltage abnormal protection.
Heroic HT8313 detailed infographic.
JL Jerry JL7016C8 Bluetooth audio SoC for wireless connectivity and audio data processing.
Close-up of the 24.000MHz crystal oscillator, which provides the clock for the Bluetooth chip.
Close-up of ceramic bluetooth antenna for wireless signal transceiving.
LPS Microsource Semiconductor LP4054 charging IC is a complete constant-current/constant-voltage linear charger for single-cell lithium-ion batteries, with high withstand voltage, ultimate withstand voltage of 11V, charging current of 500mA, and built-in battery anti-reverse polarity function. The LP4054 uses an internal MOSFET architecture that eliminates the need for an external sense resistor or a blocking diode. The charging voltage is fixed at 4.2V, and the charging current can be externally set with a single resistor. The SOT23-5's package and low external component count make it ideal for portable applications.
微源半导体LP4054详细资料图。 据我爱音频网拆解了解到，目前已有小米、荣耀、Redmi、realme、MEIZU、红魔、雷蛇、小天才、FIIL、1MORE、JBL、Bowers & Wilkins、酷睿视、Barbetsound、JLab、SUUNTO、Monster、七彩虹、Nothing、斯莫格、PHILIPS、RODE、重力星球、Haylou、如布、ELEVOC、HHOGene，黑鲨、SoundPeats、花再、JLab、OPPO、华为、联想、索尼、诺基亚、摩托罗拉、漫步者、声阔、万魔、QCY、绿联、雷蛇等众多品牌旗下音频产品采用了微源的方案。
Close-up of LED charging indicator and magic ambient light.
Another set of LED charging indicators and a rainbow ambient light.
The other two Ambience Lights are equipped with a total of 4 lights.
470μF, 10V filter capacitor from chongx Huahong.
The electret microphone is sealed with a rubber sleeve.
Close-up of electret microphone for voice call function pickup.
bocoice hummingbird Pro bone conduction bluetooth speaker dismantling family photo.
3. I love the audio network summary
In terms of appearance, bocoice Hummingbird Pro bone conduction bluetooth speaker is very small and lightweight, with magnetic function and various accessories, it can be easily fixed on various items for use. The speaker function buttons are designed with an integrated metal knob, which is in harmony with the fuselage, and has an excellent texture through CD texture decoration and glossy chamfer decoration.
In terms of the main internal configuration, it is equipped with a bone conduction unit with a diameter of about 28mm, equipped with a Heroic HT8313 Class D audio power amplifier driver; Built-in 450mAh lithium battery, LPS Microsource Semiconductor LP4054 charging IC is responsible for charging; It is also equipped with an electret microphone unit to pick up sound, and 4 LED magic lights provide a musical atmosphere.