Hello.
No, 7 years is not recommended.
However, without headphones it is also safe as it is useless.
Not everywhere In Pioneer, for example, are not blocked.Корвин wrote:In recommending the disk to listen to in the headphones in combination with closely spaced loudspeakers t e as I understand this column if stuck in amplifier headphones speakers are blocked explain how to enable this and that at the same time
Depends on the goal: if you want maximum relaxation, the jaw relaxed and half open, so that the language doesn't reach the sky if you want concentration, the language is on the sky behind the teeth.Корвин wrote:In the recommendation as well :" language is maximally relaxed" linguistic closure on the top to remove the sky or just the root of the tongue to relax