Why doesn't the buzzer turn off after tone works?

Question

Arduino

Hello. I connected a buzzer (tweeter) and launched it using tone(8, 400, 400).
But even after work, it emits quiet impulse sounds and consumes 3 -
3.2 mA.
The noTone () function also did not help
The buzzer itself in the form of a ready-made module with Ali

#include <GyverPower.h>

void setup() {
  power.autoCalibrate();
  power.setSleepMode(POWERDOWN_SLEEP);
 
  pinMode(7, OUTPUT); // Мосфет для отключения питания
}

void loop() {
  digitalWrite(7, 1);
  tone(8, 400, 400);
  delay(400);
  noTone(8);
  digitalWrite(7, 0);
  power.sleepDelay(5000);
}

Answer 1

"Zumer" you need to carefully look at the shield diagram. There should be nothing military. Boozer actually should squeak just when voltage is applied to the nameplate should be a transistor. Perhaps "tone();" does not need to be applied.
The booster cannot be directly powered by the output of the controller, the current of the booster may not be drawn.
and I would do so.
digitalWrite(7, HIGH);
digitalWrite(7, LOW);