Comments on: iPhone Dock and Headset IO Frequency Response

By: Einar Ristroph

Einar Ristroph — Mon, 20 Jun 2011 04:32:55 +0000

iPad 1? iPhone 4? Is there any frequency response data available on these?

By: gmanni

gmanni — Mon, 03 Jan 2011 10:30:39 +0000

how do we apply for getting the documentation?
I’m trying the same thing (trying to get audio input from dock on iphone 3gs)
I know we can mute the mic in several ways but I’m not sure how to get the input from pin 5 and 6 to work.
thank you in advance for your reply
G.Manni

By: ben

ben — Fri, 05 Mar 2010 15:22:41 +0000

Apply for membership in the Made for iPod program to get access to the relevant documentation.

By: Benjamin

Benjamin — Fri, 05 Mar 2010 14:48:34 +0000

Hello guys, i want to use the Dock Line In at my iphone 3G. I have a 30-Pin Dock Connector with all pins are occupied. But when i connect the Pin 2, 5, 6, the internal Microphone don´t get Muted and the Input doesn´t come from the Pins 5,6. What can I do ?

Thanks
Benjamin

By: ben

ben — Mon, 15 Feb 2010 21:50:34 +0000

Flatter is not always better.

Of course, it depends on what you’re trying to accomplish. Since this post addresses the issue of using the iPhone for audio/acoustic test and measurement, flatter would be more desirable.

By: randomdude

randomdude — Mon, 15 Feb 2010 21:39:05 +0000

Actually the lastest iphone wins, for the headset input, and the bass drop is probably intended and refined on each passing generation.

Your voice cannot go as low as 100Hz so the only thing you’re going to pick up there is unwanted noise. Flatter is not always better.

By: Paul B

Paul B — Thu, 28 Jan 2010 21:25:16 +0000

How good is the internal microphone for measuring vibrations?

By: ben

ben — Wed, 23 Sep 2009 15:33:03 +0000

That’s basically correct. When you use SignalScope to analyze a signal coming in through the iPhone 3GS headset connector, the frequencies below 200 Hz have already been attenuated according the curve you see in the plot.

By: Alex W

Alex W — Wed, 23 Sep 2009 14:45:53 +0000

I’m a little confused as to the frequency response of audio data available for use WITHIN the iPhone.
So, if I get audio input using SignalScope through the headset on my 3GS, is the data that I’m seeing on screen already missing < 100Hz?