Geiger Counter sound effect for Arduino

Geiger Counter sound generation using simple Arduino sketch const int soundout = 10; const int buttonPin = 9; int buttonState = 0; int randnum = 0; void setup() { randomSeed(analogRead(0)); pinMode(soundout, OUTPUT); pinMode(buttonPin, INPUT); digitalWrite(soundout, LOW); } void loop() { buttonState = digitalRead(buttonPin); if (buttonState == HIGH) { randnum = 750; } else { randnum = 50; } int ranNumVol = random (255); digitalWrite(soundout, ranNumVol); int randNumber = random(randnum); delay(randNumber); digitalWrite(soundout, LOW); }