In recent years , with the continuous development of artificial intelligence and other technologies, AI smart speakers have become a hot item; many companies have joined in; such as the well-known Tmall Elf, Xiaoai, Xiaodu smart speakers, Huawei AI speakers, and Tencent Dingdong Wait for smart speakers; according to incomplete statistics, there are currently nearly a hundred companies making smart speakers in China.
Although the smart speaker is small in form, its internal structure is complex, mainly including CPU processor, DRAM chip, NAND Flash chip, audio amplifier ( power amplifier chip ), Bluetooth module, power management chip, etc., which are the key to affecting the cost and completing intelligent interaction. Important electronic components for intelligent control, audio playback and other operations.
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At present, the functions that AI smart speakers can achieve are mainly wired audio content on demand, smart home control, voice tool assistants, and traditional Bluetooth and Wi-Fi audio playback.
The AI smart speaker is a highly integrated comprehensive audio system. The sound quality level is actually a display of the comprehensive strength of the unit, power amplifier, structure, algorithm, etc. Although it has more functions than ordinary Bluetooth speakers, the sound quality should always be regarded as the product The core indicators are considered; and a good power amplifier chip determines the sound quality level of the speaker.
Testing the sound quality of a speaker mainly focuses on the following points:
1. Frequency range: Low frequency can reach below 100, and high frequency can reach above 10,000. Korean NF can perfectly display music containing low, medium and high frequencies.
2. Maximum sound pressure level: The main assessment is the sound pressure output at the maximum volume; Korean NF can reach more than 80dB, which can fully meet the needs of ordinary families and ensure a loud sound when playing voice signals.
3. Total harmonic distortion: The main assessment is the nonlinear distortion of the output sound pressure; the distortion of the Korean NF power amplifier chip is less than %; the low frequency performance is thick and the high frequency is not harsh; the sound is strong, full, delicate and layered.
AI smart speaker products → Recommended audio power amplifier chips: NTP8910A and NTP8918
◆Minimum 4.5V working voltage
◆Supports 4 ohm speakers, output efficiency is over 85%
◆RS DRC dynamic power control effectively prevents sound breakage
◆2*16-segment adjustable PEQ, adding APEQ function to truly improve the sound quality
◆Feedback output with IIS SDATA, suitable for AI noise elimination
