When I released a prestigious loudspeaker system priced 168,000 JPY from 1974 to 1975, I asked my manufacturing team to apply the aging process on it before shipping. Aging is to let a newly
manufactured loudspeaker driven by some music signals for several tens of hours. This process makes each part of the loudspeaker fitted to music vibrations and thus makes the loudspeaker sound
good. This is a kind of wisdom gained from our experiences.
The sounds used for the aging process must be “musical sounds.” You may think that there is no need to be restricted to them because the purpose of the process is to give micro vibrations to the parts of the loudspeaker. Just for this purpose, “noises, including unwanted loud noises” seem to be applicable. But, they are not. I don’t know why, but in fact, using noises may even degrade the loudspeaker’s sound quality rather than make it better.
You can get good sounds when using musical sounds for the aging process. Many sound lovers agree with this. I am sure they have experiences that well-used loudspeakers sound good. But, why is it so? What is the reason of this? There has been no scientific verification found, nor quantitative measures to control the sound grading.
Everything in this natural world, the earth, humans, all the animals and plants, are tremoring at every moment. This movement itself is the power of life. Being adaptive for the movement is said to lead to the organic evolution. Watching the “fluctuation” or the “tremor” as the origin of the universe, I have been thinking, for ten years, of the way to utilize these movements particularly with regard to the audio. Admitting this is a very difficult question, I have come to think that this may help to analyze the unknown factor of the audio, especially in the interacted portion with humans.
Frankly, I feel I am just standing at the first step in considering this issue, with “the aging of loudspeakers” as a well-adapted theme to study for the time being.