# What does the heartbeat layer sound like?

https://hushmachine.com/sounds/heartbeat · Plus · Kallos Labs

> A soft heartbeat at 60 to 80 beats a minute under low, muffled noise, like the sound inside the womb.

## What it sounds like

A soft pulse under low noise.

## How Hush Machine makes it

Low-pass noise with a soft pulse at 60 to 80 BPM, made live.

## How people use it

- Part of Baby mode, with shushing.
- Keep it quiet and away from the cot; see the published advice for parents on the blog.

## Questions

### How loud should it be for a baby?

Quiet, and the speaker away from the cot. Follow the published advice for parents, such as the American Academy of Pediatrics', rather than a number from us.