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Soundproof Box for Portable generator (with muffler)

The earthquake at Tohoku disaster in Japan on 11th March 2011
was unimaginable scale.

We don’t know when and where its disaster will happen in next. Recently there seems to be
a good demands for the emergency use generator in the market but please consider its noise too loud
when you use it. In case of emergency, we should think about a neighbor circumstances
too with making a noise from your generator.

Noise is the one to the detriment of others than you might think. Enjoying the camping should be fun
but if you bother to the detriment of others by the noise from a generator, you should reduce the noise
as its manner to enjoy the camping. To reduce the noise from a generator, this Affordable
YMB type silencer will help you.

Yamato Co., Ltd received many customer voice and message for the silencers.
We have developed the soundproof box to reduce the noise for engine sound and exhaust noise both
with our experiences making automobile exhausts and industrial silencers.


Movie of trial silencer
Conditions of Testing
  • Soundproof box size:400mm (W) × 528mm (H) × 640mm (D)
  • Generator:SUBARU GENERATOR SG-550

We can’t correspond all makers’ generators selling in the market so we will start the designing
against a generator a customer owns.
We will reply with our proposal for you so please inquire from our Contact us page.


Starting the engine with a nature noise 55dB then increased to 81dB.

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This is the testing sample of soundproof box with muffler.

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Set the generator inside the soundproof box and started the engine. The noise was decreased to 68dB.

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Measured again with the distance from the soundproof box 7m. 58Db is almost as same as a nature noise.

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