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Posted By Peter Bentley
I've now got an iPhone 4 and tested my app iStethoscope Pro with the new device. The good news is that it works fine and the microphone may be more sensitive, so it may be even easier to hear your heartbeat with the new device. The bad news is that the frequency response of the iPhone 4 microphone appears to be slightly different to that of the iPhone 3G, so there is less detail at the very low frequencies and more noise at higher frequencies. Do please note that the location of the microphone is different in the iPhone 4 - it is on the bottom left, not on the bottom right!

Because the iPhone 4 has a different microphone and casing, it is necessary to modify the audio filter settings in order to hear the clearest heart sounds. My suggestion is:

Use Heartbeat pure mode and in the Audio Settings change to

Alpha value (default 150) = 125

Amplification (default 0.25) = 1

In General, scroll down and change Spectrogram scaling to

Heartbeat pure (default 0.5) = 0.3

As usual you can find the detailed help pages here and here. If you have your own suggestions for settings for the iPhone 4, leave a comment here. Otherwise if you have any problems, please leave your comments on the main support page as usual.

20 Comment(s):
Stephanie said...
AWESOME! So appreciated! I have downloaded, purchased and actively tried every Stethoscope and Auscultation App offered - none work comparatively. I use iPhone 4 - remove case - internal mic direct contact to skin - headphones (without mic) - updated "Settings" exactly as noted above - works perfectly.  I have recorded Pure Heartbeats and emailed (to myself).  The files can easily be opened from email and listed to on my iPhone.  For further use and tracking, I have downloaded Audacity on to my Desktop and have just started filing the tracks by making Projects.  Each Audacity project holds data from a specific date/event and each file is labeled so I can keep several within one Project (not audio experienced so I appreciate this has been easy to organize)  I can mute and play sound/audio clips separately with no problems.  (BTW playback on my desktop's internal speakers sounds great for my use and makes it super easy to compare sounds).  Each Heart.caf file downloads directly into each Audacity Project from my email on my iMac Desktop (OSX 10.8.2). I am not sure how to "edit or adjust" audio files other then trim the clip at either side. I am not sure I should clean them up for improving or if need to before saving as another type of file. I want to keep these recordings as PURE as possible to send these to my MDs (not sure how is best or what format to save these or if I should use Soundcloud or similar platform for sharing) The Spectrogram JPEG is also a very appreciated aspect - including both audio clip and a JPEG of the Spectrogram is great!  I really think this is amazing - for me it is ideal. Hoping MDs find it useful too, see future possibilities / opportunities - patients providing / collecting actual case / history data to offer in support of their own health.  I really appreciate this platform to track and record for my own purposes, knowledge and understanding.  I know by no way is it a diagnostic tool but, any means of collecting a recorded base of information for review / tracking / comparison is helpful.  I would think it is reassuring and confidence building for those who maybe worry too much about their health / condition, regardless of the situation. It allows an individual to hold some control, recording and listening to actual data - not just memories, recall and having to use the words "feel like".  As far as I can tell, it's consistent, which is most important in any data recording and collecting, for the comparison sake alone.  The details / differences I am recording and tracking are obvious and clear.  Each recording may not be from the same exact place or same volume or perfect in any way as  I am not a MD (obviously) and this is a tool for me, not a medical professional to use actively.  I have no idea what would be more expected for an ideal way for a patient to track heartbeat sounds in real life (in real time) episodes / effects / symptoms / events etc .. experienced.  Bottom line, for me, iStethoscope Pro is IDEAL.  EASE and CONVENIENCE to record just with iPhone for tracking, to include unanticipated events, anytime and anywhere, is ideal. Save files via email to self, replay from email on iPhone, email directly to share. The iStethoscope Pro App is great as is.  I appreciate the ability and guidance you provided for further use of this App, as my purpose is to record and collect a base of information. This Application is more then appreciated. Thanks so much for your time, ideas, attention and dedication to this project!
October 19, 2012 22:44:38
Palmer Thongwa said...
I bought your program on 22 February, for use on my iPhone 4S, version 5.01. My headphones are Beyer. After reading all the posts and replies on your web site, I am feeling very reluctant to even begin trying to use the program, fearing failure and further disappointment. Can you say authoritatively, it will work or it will not work with my equipment? Thanks.
February 24, 2012 11:06:24
Mr M Ferati said...
February 22, 2012 18:32:42
Serdar said...
I ll try
November 26, 2011 11:04:02
Peter Bentley said...
Thanks, Tony! (I think!)
June 25, 2011 12:26:13
TONY LEDUE said...
May 26, 2011 09:24:58
Ghaith said...
November 12, 2010 08:36:46
Tarkan said...
September 12, 2010 15:22:47
Peter Bentley said...
Hi Michel. Please watch the youtube videos, especially the confused smiley vid. Unless your phone is faulty, the app will work just fine on your device.
September 10, 2010 22:40:43
Michel Arnould said...
This software definitely doesn't work with my iPhone 4, iOS 4.02. Tried everything, including the settings provided on this page. No sound, no graph. Nothing. I used my stethoscope in order to assess my heart beats : no cardiac failure :-) just a software failure. Regards Dr Michel Arnould, MD France
September 9, 2010 16:44:02
Peter Bentley said...
William, try double-clicking on the home button and quitting the program; if that doesn't work just turn the phone off and on again. I've never heard of this on an iphone 4 before - can you tell me exactly what you saw when it happened?
September 4, 2010 23:39:15
William Bass said...
I also have red banner at top of my iPhone 4 I can not get rid of.
September 4, 2010 22:40:21
Peter Bentley said...
Hi Steve and Annette. Steve - we're limited by the hardware and low-level audio management of the iphone 4 and so currently the best you can do is update the filter settings, as I suggest in this post. Annette - sounds to me like you're using the white earphones, which have a built-in microphone. If you want to use the microphone at the bottom, use headphones. See the new video with the confused smiley!
September 4, 2010 18:57:41
Annette said...
Hello, The first time i tried it with my iPhone 4 it worked just fine. But now i can only use the microphone on my handsfree, the mic on the phone does not seem to work anymore. My phone workes just fine when i use it to phonecalls. What can i do to make it worke again? Annette
September 4, 2010 11:58:03
Steve said...
Is there anyway to get better mic pickup on an iPhone 4? The top mic interferes with the sound and washes out the bottom pickup when you have headphones on thank you
September 4, 2010 07:35:32
Peter Bentley said...
Hi Debbie, sometimes (very rarely!) Apple's audio routines misbehave in firmware 4 on the iphone 3G, resulting in this effect - the audio does not shut down normally. You need to restart the phone and it will be fine again.
September 2, 2010 09:20:34
Debbie said...
I have a red pulsating alert the top of my iphone4 even though I have deleted the istethpro application. How can I remove this? Please help.
September 1, 2010 18:41:14
Debbie said...
I have a red pulsating skeeter the top of my iphone4 even though I have deleted the istethpro application. How can I remove this? Please help.
September 1, 2010 18:26:22
M Wong said...
Gh Pod
September 1, 2010 14:34:37
Victor Lopez-Cepero said...
Im tryng looks good
September 1, 2010 00:28:33
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