Tag: Voice Isolation

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AirPods 4 (2024)

Beginning in 2024 Apple began offering the entry-level AirPods 4 product in two versions: AirPods 4 and AirPods 4 with Active Noise Cancellation. These AirPods 4 are the “base” model without the additional features.

As Apple often mentions, “AirPods 4 are the best headphones Apple has ever created.” The updated headphones offer “open-ear design, setting an entirely new benchmark for fit and comfort.”

Apple improved the fit and comfort of these AirPods:

“The new design is built with an unparalleled data set that uses advanced modeling tools, like 3D photogrammetry and laser topography, to precisely map and analyze thousands of ear shapes and over 50 million individual data points in total. This process helped refine the design to deliver the most comfortable AirPods ever with one shape that naturally fits even more users around the world.”

AirPods 4 offer the following core technologies:

  • Custom high-excursion Apple driver
  • Custom high dynamic range amplifier
  • Voice Isolation2
  • Personalized Spatial Audio with dynamic head tracking3
  • Adaptive EQ
  • Vent system for pressure equalization

The AirPods 4 with Active Noise Cancellation add 4 features, including Active Noise Cancellation, Adaptive Audio, Transparency mode, and Conversation Awareness. These additional features also allow this model to use Live Translation for communicating across languages.

AirPods 4 are powered by Apple’s H2 headphone chip. Built-in sensors include:

  • Dual beamforming microphones
  • Inward-facing microphone
  • Optical in-ear sensor
  • Motion-detecting accelerometer
  • Speech-detecting accelerometer
  • Force sensor

These sensors offer many new features not available in previous “base” AirPods models:

“With the H2 chip, AirPods 4 unlock intelligent audio experiences only Apple silicon can deliver, such as Voice Isolation, enabling clearer call quality no matter the environmental conditions, and Siri Interactions, allowing users to simply nod their head yes or gently shake their head no to respond to Siri announcements. For even more control, AirPods 4 also feature a new force sensor on the stem to play or pause media and mute or end calls with a quick press.”

Each AirPod 4 is 1.19 inches (30.2 mm) x 0.72 inch (18.3 mm) and 0.71 inch (18.1 mm) deep. Each weighs 0.15 ounce (4.3 grams). The AirPods 4 case measures 1.82 inches (46.2 mm) x 1.97 inches (50.1 mm) and is 0.83 inch (21.2 mm) deep. The case weighs 1.14 ounces (32.3 grams).

The base AirPods 4 allows only USB-C connector charging, while the AirPods 4 with Active Noise Cancellation adds Apple Watch or Qi‑certified charging. AirPods 4 allow up to 5 hours of listening time on a single charge, however, 5 minutes of charging provides around 1 hour of listening time.

AirPods 4 connect using Bluetooth 5.3.

Source: Apple (product page, newsroom)

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AirPods Pro (Generation 2, 2022)

Apple announced the Generation 2 version of AirPods Pro on September 7, 2022. Apple described these AirPods as the “most advanced AirPods ever” and reported the product highlights in a press release:

“With the power of the new H2 chip, AirPods Pro unlock breakthrough audio performance — including major upgrades to Active Noise Cancellation and Transparency mode — while also offering a unique way to experience Spatial Audio that’s even more immersive. Now, customers can enjoy Touch control for media playback and volume adjustments directly from the stem, along with longer battery life, a brand-new charging case, and an additional ear tip size for a better fit.”

The H2 chip in the AirPods Pro Generation 2 provided better noise cancellation as the original AirPods Pro and cancelled “up to twice as much noise over the previous generation.” Apple also improved the bass and engineered a “crystal-clear sound across a wider range of frequencies.” To improve the fit of this version of AirPods Pro, Apple included a new extra-small ear tip as a custom size option.

Apple also included a variety of Adaptive Audio features in the AirPods Pro Generation 2. The adaptive features worked by “automatically prioritizing sounds that need your attention as you move through the world. By seamlessly blending pro‑level Active Noise Cancellation with Transparency mode when you need it, Adaptive Audio magically delivers the right mix of sound for any environment.” Other features included:

  • Voice Isolation—Improved the quality of phone calls in loud or windy conditions using advanced computational audio.
  • Personalized Volume—Used machine learning to understand listening preferences in different environments, and automatically adapted sound over time.
  • Conversation Awareness—Automatically lowered the volume of what’s playing when speaking with someone nearby.

Three personalized listening technologies included Personalized Spatial Audio, Dynamic head tracking, and Adaptive EQ. The MagSafe Charging Case that shipped with the AirPods Pro Generation 2 allowed charging with USB‑C, an Apple Watch charger, or a MagSafe charger. The case also included Apple’s U1 chip to allow Find My with Precision Finding. Finally, the new case included a structure for a lanyard loop.

Sources: Apple (Newsroom, Product)