次期モバイルOS「Android 15」で注目すべき15の新機能 | WIRED.jp
グーグルが手がけるモバイルOSの次期バージョン「Android 15」の詳細が明らかにされつつある。このバージョンには数々の新機能や改良が盛り込まれており、 ...
CTA-2075
あるアプリから別のアプリに切り替えると、いきなり音量が大きくなって耳障りに感じることがあるだろう。ありがたいことに、Android 15では「 <anchor>CTA-2075</anchor>」と呼ばれるラウドネス標準に対応している。つまり、スピーカーやヘッドフォン、イヤフォンの特性を考慮してアプリ間の音量を比較し、いきなりボリュームが大きくなったり小さくなったりしないように音声をインテリジェントに調整してくれるのだ。
Loudness Standard for Over the Top Television and Online Video Distrib
Loudness Standard for Over the Top Television and Online Video Distrib
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# Loudness Standard for Over the Top Television and Online Video Distribution for Mobile and Fixed Devices (ANSI/CTA-2075)

This standard applies to devices, whether mobile or fixed, that receive OTT and OVD services and create audio output either through a built-in loudspeaker or through an interface to an external transducer or another A/V device. It describes the management of loudness and dynamic range within a device, with or without the use of metadata, to optimize the listener experience considering:

1. the available resources of the device to achieve appropriate SPL,
2. environmental or physical conditions that affect the way a given loudness level and dynamic range are experienced,
3. user preferences that change the required loudness and dynamic range.

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