NRF-005T

Basic

PULSHUT® is a revolutionary noise suppression material that does not use any magnetic materials, and suppresses electromagnetic noise and radiation noise generated by AV equipment and cables, enabling reproduction of sound closer to the original sound.

Oyaide Electric has commercialized the MWA Series of sendust alloy-based electromagnetic wave absorbers, which have been very well received as long-selling products. In order to meet the needs of today's high-frequency noise-sensitive market, we have started to develop a new noise suppression material, NRF-005T, with the aim of achieving even higher performance.

Our focus is on avoiding "no fish in fresh water". This is because audio accessories that claim to absorb noise can filter out the nuances and realism that should be present in music and video without careful design, and can cause them to lose their vitality.

NRF-005T solves the dilemma between noise reduction and original sound fidelity, providing a ground-breaking and innovative product for all audiophiles.

Features

PULSHUT ® : 5 Important Features

1. High performance non-woven fabrics that do not contain any magnetic material.
2. Effective against noise in a wide frequency range from MHz to GHz bands.
3. Substrate is as thin as 0.05 mm and extremely lightweight.
4. Excellent flexibility and can be attached to uneven surfaces.
5. Both the sheet surface and the cut surface have high insulation properties, so it can be attached to conductive surfaces.

What is "PULSHUT®" ?

Conventional noise suppression materials have the property that the amount of noise suppression can be controlled by adjusting the magnetic material and the amount of magnetic material used. They have high magnetic loss characteristics and achieve their noise-absorbing effect by converting electromagnetic noise into heat. On the other hand, the impedance in certain frequency bands increases, which also affects the original sound waveform. This is similar to the properties of ferrite cores. This means that, as with EMC/EMI countermeasures, appropriate noise countermeasures were necessary for audio as well.

PULSHUT® is a highly functional non-woven fabric with a special surface treatment that provides high noise suppression performance despite its non-magnetic nature. This characteristic makes it possible to suppress only the noise component while minimizing the effect on the original sound waveform.

Measurement of Acoustic Characteristics Performance of PALSHUT®

The noise suppression effect was verified by attaching PULSHUT® to a PCB (the one in the picture).
Model PC board (measurement image)

Magnetic field suppression effect * Observed frequency: 100-400 MHz

This confirms the suppression effect on "magnetic fields tied to the suppression of electric fields.

Electric field suppression effect * Observation frequency: 250-700 MHz

Electric field suppression effect (full surface attachment.) *Observed frequency: 250-700 MHz.

The electric field suppression effect can be confirmed by attaching PULSHUT® to the entire surface of the board.


Microstrip line measurement

Measured 97% absorption at high frequencies above 2.4 GHz
This shows that it has the same high noise absorption characteristics as conventional noise suppression materials.

Measurement of Acoustic Characteristics

In verification data (Red Line is measurement with PULSHUT attached) on a related product called Asahi Kasei PULSHUT® MU (support changed to PP), which uses PULSHUT® as the base material, harmonic distortion analysis (1 kHz) showed that the energy levels other than signal waves were reduced by approximately 4.71 db, and pink noise analysis results showed almost no change in sound pressure levels. The pink noise analysis results showed almost no change in sound pressure levels.

These results show that PULSHUT® has a reduced effect on the original sound waveform and acts only on the noise component. *Measurement results are representative values and are not guaranteed.

The Differences between “NRF-005T” and MWA Series

Oyaide Electric has the Sendust alloy-based electromagnetic wave absorber MWA Series, which has already been well received by customers. MWA Series is one of the excellent noise suppression materials widely used within Oyaide products as the key to sound quality adjustment.

PULSHUT® is a completely new noise suppression material and therefore has a number of characteristics that differ from those of MWA series. By determining the right material for the right job from the properties of each material and using them together in your own environment, they can contribute to improving the S/N and demonstrating the potential of your audio system.

Recommended Area of Use

※The effectiveness of both of these products increases or decreases depending on the "distance from the noise source. It is recommended that they be attached close to a contact point or conductor that may be the main source of noise.

※The suppression effect of both varies according to the "amount of noise suppressant used." However, because PALSHUT® mainly suppresses noise components, little change occurs when there is no noise to be suppressed.

※Noise suppression effects can be expected even in locations other than those recommended. Please do not be bound by stereotypes and try it on various types of audio equipment.

Reduced environmental impact by complying with RoHS Directive

The content of environmentally hazardous substances (lead, mercury, hexavalent chromium, cadmium, etc.) is below the limit of measurement and complies with the RoHS Directive.

Excellent noise absorption with simple use

It is very easy to use. By attaching it to the input/output terminals of audio equipment, around noise-prone areas, and on cables and plugs, it exerts a highly effective noise suppression effect. It lowers the noise floor without deforming or distorting the waveform of the original sound, and improves delicate expression with fewer incidental sounds. In addition, the effect on video is to reduce blurring of contours and increase the clarity of colors. In sound quality, the S/N ratio is improved, the center of gravity is stabilized, the localized sound image is brought into focus, the sense of noise filling the air space is eliminated, and the sense of sound field is expanded.

Flexible workability, cut and paste with scissors

Easily cut with scissors, etc., and has excellent flexibility, making it possible to affix to curved surfaces such as cables, etc. Excellent processability and workability.

The acrylic adhesive has reworkable adhesive strength, yet has sufficient holding power and can be reattached many times.

PET resin is used for the support, which keeps a stable shape even after cutting, and non-woven fabrics can be attached without fraying. The key to a beautiful finish is to apply a light tension while attaching.

For Areas other than Audio Applications

Various applications as a high-frequency noise suppressant are expected.

*Example: "Noise suppression for devices that dislike magnetism," "As a lightweight and thin noise suppression material," "High-frequency noise suppression for PCs, smartphones, and game consoles," etc.

Cautions for Use

1. Although the product can be used in a wide range of operating temperatures from -20 to 90°C, avoid attaching it to locations where overheating or cooling beyond this temperature is anticipated (CPU, GPU, vacuum tubes, etc.).
2. Avoid using the product in such a way as to obstruct heat dissipation, such as by blocking heat dissipation holes in amplifiers or PCs.
3. Avoid storing the product in direct sunlight.
4. Avoid storing or using the product in high temperature and humidity as much as possible, as the adhesive may deteriorate.
5. Wipe off any dust, oil, etc. on the adherend (mating surface) well before applying the adhesive.
6. Although reworkable adhesive is used, repeated application and removal will weaken the adhesive.
7. The adhesive is designed not to leave adhesive residue, but just to be safe, do not apply it to areas where adhesive residue is likely to be left.
8. Although the adhesive can be removed by hand after application, please do not apply it to areas where it may be difficult to peel off.