关键词：雅马哈,耳机方案,助听器芯片,YAMAHA,YMU831方案,耳机主动降噪方案,什么是主动降噪
简介：雅马哈耳机主动降噪方案：耳机搭载YUM831降噪芯片，实现ANC（Active Noise Cancellation）功能，无需Voice MIC,就能实现HF通话，还可将此作为助听器使用（Hearing Aid）

最新一代雅马哈耳机主动降噪方案：耳机搭载YUM831降噪芯片，实现ANC（Active Noise Cancellation）功能，开启安静完美的听觉之旅。

主动降噪功能特点：

1、媲美市场主流的耳机主动降噪效果（ANC）
2、无需Voice MIC,就能实现HF通话
3、强大的噪声抑制和ANC效果并用，对在嘈杂环境下通话十分有效

此外，还可将此作为助听器使用（Hearing Aid）
作为助听器的功能特点：

1、将手机作为日常用的助听器使用
2、日常会话助听、看电视助听

雅马哈耳机主动降噪方案：耳机搭载YUM831降噪芯片

Active Noise Cancel –Head Phone Solution

耳机主动降噪方案

Yamaha Active Noise Cancel “ANC” Solution Feature

YAMAHA主动降噪解决方案的特点

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:数字技术耳机主动降噪系统

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 : 主动降噪-耳机

Active Noise Cancellation for HP using digital-processing

Feed-forward type ANC

Hybrid (FF&FB) type ANC

ANC : Signal flow

ANC : 信号流

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 助听器

Using ANC HP for sound collector

Hearing aids for speech and TV

・latency： 4ms(NS=OFF), 5.3ms(NS=ON)

・Stereo Hearing aid processing