# 👂 What is CustomTune and how does it work?

*Published: 2026-01-20 | Updated: 2026-01-20 | Source: https://shopsavvy.com/answers/what-is-customtune-and-how-does-it-work*

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## Product: Bose New QuietComfort Ultra Bluetooth Headphones (2nd Gen), Wireless Headphones with Spatial Audio, Over Ear Noise Cancelling with Mic, Up to 30 Hours of Play time, Desert Gold - Limited Edition Color
**Brand:** Bose

CustomTune is Bose's proprietary technology that automatically calibrates audio and noise cancellation for your specific ear geometry.

## How It Works

| Step | What Happens |
|------|--------------|
| 1. Put headphones on | Brief calibration tone plays |
| 2. Acoustic analysis | Microphones measure how sound interacts with your ears |
| 3. Optimization | Audio and ANC adjust based on analysis |

The process takes 1-2 seconds and runs automatically—no user action required.

## What Gets Optimized

- **Sound Accuracy:** Compensates for ear shape variations
- **Bass Response:** Adjusts based on seal quality
- **ANC Performance:** Tailors noise cancellation to your anatomy
- **Frequency Balance:** Ensures consistent reproduction

## Why This Matters

Everyone's ears have different physical characteristics:
- Ear canal depth
- Outer ear (pinna) shape
- Acoustic properties

These variations significantly affect how sound reaches your eardrum and how effectively noise cancellation works. Two people wearing identical headphones will perceive them differently—CustomTune minimizes this variation.

## CustomTune vs. Manual EQ

| Feature | Purpose | Control |
|---------|---------|---------|
| CustomTune | Technical optimization for anatomy | Automatic |
| Manual EQ | Personal preference tuning | User-controlled |

CustomTune ensures optimal performance for your ear shape. EQ adjustments layer on top for personal taste preferences.

## Recalibration

CustomTune runs each time you wear the headphones. To trigger a fresh calibration (if sound seems off), simply remove and replace the headphones—takes one second.

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*Where this comes from: This answer is based on ShopSavvy's product database, real-time pricing from thousands of retailers, and analysis of user reviews to give you a well-rounded picture.*