We Create
Your Own
Sound Zone.

The voice of a telecommuting partner in an open office.
A child's voice that you want to hear while teleworking.
A favorite song that you want to enjoy in a crowded place while traveling.
Depending on the situation, the sounds you want to hear will always be changing.
"Only the sounds you want to hear can be heard”. NTT sonority will make such a world a reality.

High quality audio for all your daily life.

Open ear wearable devices without sound leakage that can be used in both private and business situations, and portable speakers that propagate sound only within a certain range.
We provide a more comfortable lifestyle with products that allow you to enjoy high quality audio while talking as usual.

Experience sound like never before in your own “Personalized Sound Zone”.

We are developing aircraft seats that provide a more private acoustic space in the aircraft, and automobile seats that allow different audio playback for each user to improve comfort in the automobile WITHOUT using earphone or headphone. The ability to enjoy audio comfortably in a private space makes long journeys more enjoyable and comfortable.

Business OverviewService

We are engaged in the following businesses related to voice, sound, etc.

  • Planning, development, manufacturing, sales and commissioned development of audio equipment, etc

  • Research and development of acoustic technology, provision of technology, and commissioned work for experiments, etc.

  • Research, measurement, analysis and consulting of sound-related information


An unprecedented sound experiences, Stress-free sound environment

Invention of PSZ technology, the core technology for providing the ultimate private acoustic space

This is a technology that uses dedicated speakers with special hardware technology and acoustic signal processing technology to reproduce sound in a specific area with open ears, without the use of wearable devices such as earphones or headphones.| PSZ technology does not rely solely on digital signal processing as in the past, but realizes new value by discovering the basic principles of acoustics and incorporating them into hardware. In addition to PSZ technology, we provide products and services that realize a comfortable acoustic space in a variety of business and private situations by combining globally competitive acoustic technologies such as intelligent microphone technology and active noise cancellation technology.


  • 2023.03.15

    • Information

    Crowdfunding for nwm MBE001 will begin on March 27, 2023, through Indiegogo in the US

  • NTT sonority, Inc. has entered the consumer electronics market in the US via the development of an entirely new type of earphone using a unique technology called the “Personalized Sound Zone” (PSZ). The company has announced plans to commercially release the world's first open-ear PSZ technology developed by NTT Corporation (NTT) that locks audio into a small, individualized space.
    Crowdfunding for the wireless model nwm MBE001 on-ear speakers equipped with PSZ technology will begin on March 27, 2023, through Indiegogo.

    NTT sonority's audio brand "nwm" will continue to enhance its products with PSZ at their core, maximizing consumer safety and allowing users to experience the comfort of being connected through sound without having to worry about sound leakage.
  • 2022.06.08

    • Information

    June 8, 2022, Aircraft premium class seat with immersive acoustic experience coming at Aircraft Interiors EXPO 2022 in Hamburg.

  • NTT Sonority Corporation will jointly exhibit with Jamco Corporation, a leading manufacturer of aircraft interior components, at Aircraft Interiors EXPO 2022 to be held at Hamburg Messe, Germany, from June 14th to 16th.

    In this exhibition, we will provide a brand-new experience in aircraft under the theme of "Ultimate Private Acoustic Space".

    Personalized Sound Zone speakers will be installed in the headrests of Jamco Corporation's "Venture" premium class seats.

    [Description of the unique acoustic technology]

    1. Personalized Sound Zone (PSZ)
      Technology which creates a private acoustic zone in an open space by enclosing the sound from the speaker and preventing sound from dissipating into the environment.
      Stress-free with no headphones and earphones and enables seamless communication with people around you.

    Aircraft Interiors EXPO 2022

    About NTT Sonority

    NTT Sonority is part of NTT Group, a leading company in the telecommunications business worldwide with long expertise in research and development for acoustic signal processing. Taking advantage of our unique and innovative technologies, starting from echo cancelling, noise reduction to personalized sound zone, our mission is to deliver comfort and new experience to lifestyles.
  • 2022.06.03

    • Information

    June 3, 2022, New smart chair with immersive acoustic experience coming at Salone del Mobile 2022 in Milan.

  • 2022.02.28

    • Information

    February 28, 2022, We exhibited at MWC Barcelona 2022.

  • 2021.09.01

    • Information

    September 1, 2021, NTT Sonority, Inc. was established.


NTT sonority, Inc.
September 1, 2021
and CEO
Hiroshi Sakai
Capital stock
0.1 billion yen
Our Services
  • (1)

    Planning, development, sales, licensing, and contract development of software related to voice, sound, etc.

  • (2)

    Planning, development, design, manufacturing, sales and contract development of hardware related to voice, sound, etc.

  • (3)

    Research, development, provision of technology and contract research and development of technology related to voice, sound, etc.

  • (4)

    Research, analysis and consulting of information related to voice, acoustics, etc

  • (5)

    Planning, design, construction, installation, maintenance, operation and leasing of audio equipment

  • (6)

    Planning, production, distribution, and licensing of digital content

  • (7)

    All businesses incidental to or related to the preceding items

Head office
3-20-2, Nishishinjuku,
Tokyo 163-1432, JapanGoogle Map


For all inquiries,
please contact us by email.