[Hit product development secret story] Sony's complete wireless earphone "WF-1000XM4" that combines noise canceling and high-resolution high quality

Sony's best -selling series that quickly commercialized earphones with noise canceling functions.We asked the developers thoroughly with the new features of the complete wireless headphones "WF-1000XM4" with the previous work.

Sony "WF-1000XM4"

Open price (actual price approximately 33,000 yen)

With the high performance of noise canceling, the sound quality is raised!

─ What is the biggest evolution point from "WF-1000XM3", which is evaluated for noise canceling and high sound quality?

Kanda noise cancellation is high performance.In "WF-1000XM3", I was still dissatisfied personally.The sound of the intermediate frequency band like a human voice could not be suppressed.

　In general, the active sound insulation by the NC circuit is effective in the low range, and the passive sound insulation due to the earpiece and the housing structure is effective for high frequencies, but this time we are reviewing both passive and active aspects.Regarding the low frequency range, the sound insulation of the earpiece has been improved, the performance of the driver, and the high -frequencies have been recruited for low -delay processors and signal processing, so that people's voices can be further suppressed.In addition, while the sound insulation effect has increased, the external sound import function enables the high -frequency noise to naturally reproduce the spread of the outside sound.

The higher sound quality of the Tsuji compression sound source is also evolving.Using AI, we analyze the songs being played in real time, perform upscaling that matches them, and use high -resolution equivalent sound quality.

──An AI determines the characteristics of the sound based on the song?

We judge the scenes of songs such as the type of Kanda musical instrument and the tone, and process them so that they can reproduce the optimal waveforms that are optimal.Because it supports LDAC, you can enjoy high -resolution sound sources wirelessly.

で す か What is the new point other than the anal performance and high -quality sound?

Tsuji earphone is smaller.In the past, it fits the ear with three points, but this time the whole fits in the ear.Increase the battery duration to achieve lighter weight.There is also drip -proof performance of IPX4.

The size and layout of all parts are reviewed for Kanda miniaturization, and the circuit has been powered into power, and the battery duration has been increased without changing the size of the built -in rechargeable battery.

─ How is your future prospects?

Tsuji has been multifunctional in response to user needs.As there are many places that can be set, I would like to proceed with automatic switching according to the environment.In addition, we want to develop the paper package realized with this product in some form from the SDGs point of view.

By minimizing the housing than "WF-1000XM3", and making the shape supported on the inside of the ear, the feeling of mounting is enhanced.

Effectively reduces mid -high -frequency noise such as human voices from low -frequency noise such as vehicles.ANC -on achieved up to 8 hours of music playback.

Equipped with a newly developed driver unit that improves the rehabilitation ability of the bass by improving the amplitude range of the vibration plate and improving the response.Improved low -frequency noise reduction effects.

The high -frequency noise is reduced using a proprietary polyurethane foam material that fits the ears.The earpiece was a unique structure and pursued installation stability and ease of attachment.

[Hit equation]

The performance of the previous work was further brushed up to improve the performance.Pursuing convenience by multifunctional that meets user needs.Small and lightweight is also realized.

Interview / sentence / Tsuyoshi Kawano

* Prices and services listed in this article may be changed as of November 30, 2021.note that.

The latest issue of DIME is "2021 Hit Product Total Summary" and "2022 Trend Large Prediction"

In the latest issue of "DIME", in addition to the introduction of products and services that were hit in 2021, the secrets that hit the hit, behind the scenes, and those that are likely to be popular in 2022.The special appendix is an oversized 10 -inch electronic memo pad that can be used at work and at home.Although it is an oversized 10 -inch size that can write plenty of pictures and letters, it is 6mm thick, weighing 143g, which is thin and lightweight and easy to carry.Moreover, about 100,000 rewriting is possible.There are various uses, such as hooking on the hook, hanging it with a string, or standing up with a dedicated pen.

[Purchase at Seven Net Shopping]

https: // 7net.Omni7.JP/Detail/1231587976