關鍵詞：雅馬哈,耳機方案,助聽器芯片,YAMAHA,YMU831方案,耳機主動降噪方案,什么是主動降噪
簡介：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，無需Voice MIC,就能實現HF通話，還可將此作為助聽器使用（Hearing Aid）

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