: The vacuum cleaner (elektrik süpürgesi) provides a consistent, low-frequency hum that masks sudden household noises that might startle a sleeping baby.

: Place the sound source at least a few feet away from the crib rather than directly next to the baby's head.

: The album "Kolik Bebek" by Rahatlatıcı Sesler includes a track specifically combining "Pis pis ve elektrik süpürgesi".

You can find extended versions of these sounds (often lasting 1 to 1.5 hours) on various platforms:

: The "shush" (piş piş) sound resembles the blood flow and heartbeat sounds a baby hears before birth.

: These sounds trigger a baby’s natural calming reflex, helping to reduce crying and encourage longer sleep cycles. Listening Resources

: A 1.5-hour continuous loop is available from Samir Mohamed .