最新一代雅馬哈耳機主動降噪方案：耳機搭載YUM831降噪芯片，實現ANC（Active Noise Cancellation）功能，開啟安靜完美的聽覺之旅。
主動降噪功能特點：
1、媲美市場主流的耳機主動降噪效果（ANC）
2、無需Voice MIC,就能實現HF通話
3、強大的噪聲抑制和ANC效果并用，對在嘈雜環境下通話十分有效
此外，還可將此作為助聽器使用（Hearing Aid）
作為助聽器的功能特點：
1、將手機作為日常用的助聽器使用
2、日常會話助聽、看電視助聽
雅馬哈耳機主動降噪方案：耳機搭載YUM831降噪芯片
Active Noise Cancel –Head Phone Solution
耳機主動降噪方案
Yamaha Active Noise Cancel “ANC” Solution Feature
YAMAHA主動降噪解決方案的特點
ANC using digital-processing
Better sound quality comparing Analog type HP
Connecting by USB Type-C Interface
Easy mode setting by Android Application
Yamaha Voice and Music Enhancer
Better Hands free talking by Beam Forming, Noise Suppressor, Echo Cancel
Yamaha Audio Effect for Music and Movie contents
Hands Free and Audio Effect tuning by Yamaha Sound Engineer
Co-work with ODM
ODM maker already developed ANC HP with Yamaha Solution
Speedy product release to market using ODM
MACH-5 : Digital ANC-HP System with MACH-5
MACH-5:數字技術耳機主動降噪系統
2-chip solution
MACH-5 : Low-latency DSP with MIC-Amp/HP-Amp
CPU : Only for initialization of DSP
High performance CPU is unnecessary
ANC-HP System
MACH-5 : ANC-HP
MACH-5 : 主動降噪-耳機
Active Noise Cancellation for HP using digital-processing
Feed-forward type ANC
Hybrid (FF&FB) type ANC
ANC : Signal flow
ANC : 信號流
FF-ANC and Hybrid(FF&FB)-ANC
FF IRR, FB IIR and Music IIR are designed by ANC filter design software
Calibration gains are used for compensation in production line
User gains are controlled by headphone/earphone users
MACH-5 : Feed-forward ANC Performance
ANC performance [dB]
parameter set ANC performance (data 370)
MACH-5 : ANC @ Power consumption
Playback
HP : SONY MDR-NC31EM
MIC
Analog-MIC : SONY MDR-NC31EM (bias = 2.0V)
ANC
Algorithm ： Feed-forward ANC @ 192kHz
MACH-5 : ANC + Voice Enhancer (HandsFree)
Good HF(HandsFree) effect with BF(Beam Forming) using the
same microphone for ANC.
Receiver
Suppress environmental noise with ANC
Emphasize voice linked to environmental noise
with BVE（Bright Voice Engine)
Transmitter
No additional Voice Mic with ANC-MIC
Better Noise Suppression: Suppress unexpected sound with BF
Better Echo Cancel : Echo cancel corresponding to Type1
- Supports HF without Voice MIC
- Good communication under
noise environment with strong
noise suppressor and ANC
MACH-5 : ANC + Music Enhancer
■F-DSP/AudioEngine
■AEQ : PhaseCorrection
■252 : Surround
■B-DSP/AudioEngine
■WIDE : Stereo Expander
■HXT : 2-band Harmonics Enhancer
■EQ3 : 3-band PEQ
■DRC3 : 3-band DRC
■DRC : Single-band DRC
■Tone Generator
MACH-5 : ANC + Hearing AidHearing Aid (Headphone)
MACH-5 : ANC + 助聽器
Using ANC HP for sound collector
Hearing aids for speech and TV
?latency： 4ms(NS=OFF), 5.3ms(NS=ON)
?Stereo Hearing aid processing
