Early iPhone 4 Phone Audio Quality Testing Results
For those who may be interested, here are some early testing results of audio quality through the iPhone 4 in three different use models. In summary, handset performance is the most improved for both incoming and outgoing audio, with headphone port performance only modestly different, while speakerphone performance is better for the iPhone 4 user, but not as much to the person on the other side of the call.
Handset Performance. The most noticeable improvements on the iPhone 4 relate to its two speakers, which have both seen dramatic volume upgrades. In handset mode, the iPhone 4 at 9/16 of its volume is roughly equivalent to the iPhone 3G/3GS at maximum volume, so the iPhone 4 at peak volume is roughly 40-50% louder—an extremely noticeable difference. iPhone 4’s handset speaker sounds a little clearer than the ones in iPhone 3G and 3GS, even at higher volumes, for “very clear” overall sound that has roughly the same tonality as before.
iPhone 4’s noise-canceling microphone works properly and impressively in handset mode. During silences, the microphone sounds just a little clearer than with the iPhone 3G and 3GS, such that words are a little more distinct. However, iPhone 4 improves considerably when there’s ambient noise in the background. During an iPhone 3G test call, music playing loudly in the background could be heard during both gaps in speech and while the person is speaking; with the iPhone 4, the music was completely filtered out after only a couple of seconds, becoming all but impossible to hear during either gaps or speech, with only very slight clipping of the speaker’s voice—the caller can hear virtually everything perfectly. The effect is similar to the Jawbone series of headsets, only built right into the phone.
Headphone Performance. Sonic differences were very modest between the iPhone 3G and iPhone 4 when testing with the same pair of Apple Earphones with Remote and Mic. Audio sounded ever so slightly better on the iPhone 4, but not in a meaningful way. Notably, the iPhone 4’s second noise-canceling microphone doesn’t work as well when you use microphone-equipped headphones; trickles of ambient noise pop in and out both during silences and speech.
Speakerphone Performance. The iPhone 4 at 10/16 volume is roughly as loud as the iPhone 3G/3GS at maximum volume, and doesn’t suffer from the same audio clipping and harshness that the earlier speaker did at the peak volume level. At maximum volume, there’s a substantial difference—the iPhone 4 is roughly 40% louder, and still clearer than the iPhone 3G/3GS at its peak. Unfortunately, these improvements benefit only the person listening with the iPhone 4, while the person on the other side doesn’t get a huge benefit. Noise-cancellation with iPhone 4’s dual microphones doesn’t appear to work very well, if at all, in speakerphone mode; the iPhone 4’s mics pick up as much ambient noise as voice, making it difficult to discern one from the other. On the other hand, the iPhone 4 user in a noisy music-filled room can hear you talking if the iPhone 4 is at maximum volume, whereas the iPhone 3G/3GS are drowned out.
We’ll have much more to say on the iPhone 4’s test results soon.
If you have a comment, news tip, advertising inquiry, or coverage request, a question about iPods or accessories, or if you sell or market products, read iLounge's Comments + Questions policies before posting, and fully identify yourself if you do. We will delete comments containing advertising, astroturfing, trolling, personal attacks, offensive language, or other objectionable content, then ban and/or publicly identify violators. Wondering why we're talking about something other than iPods? Check the Archives: Backstage has been here and kicking it since 2004.
- App Store prices going up in Australia, Indonesia and Sweden
- Apple’s antitrust monitor is leaving for good
- Happy Columbus Day + Canadian Thanksgiving!
- Apple now selling SIM-free iPhone 6s and iPhone 6s Plus
- AT&T opens up Wi-Fi calling for iPhone
- Battery impact of Samsung vs TSMC A9 chips overestimated? (Update: Apple response)
- Apple TV, iPad Pro to be sold online in late October, in stores early November?
- iBooks adds exclusive enhanced editions of Harry Potter series
- Report: Barclays to launch Apple Pay support in the UK early next year
- Apple reveals Beats Pill+ speaker
- Creative Sound Blaster Roar 2 Bluetooth Speaker
- Parrot Airborne Night and Airborne Cargo Drones
- Griffin Survivor Journey and Survivor Summit for iPhone 6/6s
- Parrot Jumping Night and Jumping Race Drones
- Trident Case Aegis Pro Case for iPhone 6/6s
- Scosche boomBOTTLE+ Waterproof Wireless Speaker
- Just Mobile Quattro Folio for iPhone 6s
- X-Doria Defense Lux for iPhone 6s/6
- Spigen Perfect Armor for iPhone 6s, Slim/Tough Armor for iPhone 6s Plus
- Spigen Neo Hybrid / Carbon / EX + Ultra Hybrid for iPhone 6s/6s Plus
- Instant Expert: Secrets & Features of iOS 9.0
- Under the Radar: A closer look at smaller iPhone 6s and iPhone 6s Plus changes
- A First Look at iOS 9’s Transit in Apple Maps (Updated for watchOS 2)
- Instant Expert: Secrets & Features of iTunes 12.2
- Instant Expert: Secrets & Features of iOS 8.4 + Apple Music
- CE Week 2015: IK Multimedia, Monowear’s Apple Watch bands + More
- Live From CE Week 2015: Brand New iPad, iPhone + Mac Accessories!
- Opinion: The ‘Grand Experiment’ of shifting to Google Photos
- Will removing a credit card from Safari also remove it from Apple Pay?
- Can I mute Handoff calls coming into my Mac from my iPhone?