An iPhone is probably not the best tool if you are looking for high-accuracy audio analysis/results however, this app was able to provide me the data I was looking for to prove my case. I have a sound problem which I am hoping that someone can help me with I have just moved into a new flat (ground floor victorian flat in terraced house with two flats) and there is a very high pitch sound across the flat, but mainly in the bedroom, that is keeping me awake at night. I am not an audio engineer, nor do I work with professional audio equipment. With any analysis and review, I have tested this to reproduce the issue multiple times and the results are consistent. For that reason I've hidden the logo on the manufacturer's AC power adapter.

While there are reports of other users experiencing the same problems on their forums and elsewhere, I do realize when a company manufactures 100k+ devices, it is possible to get a lemon.

I used an iPhone 5s for testing-it works with iOS 7 and gave me the data I needed to prove to a manufacturer there was an issue. I’m sure most of you know what I’m talking about. There are several hardware-based sound analyzers one can purchase however, I found a better solution that works on an iPhone, SPLnFTT Noise Meter for iPhone ($3.99). What’s with that ANNOYING high pitch noise comming from the Seibu building in Shibuya So it’s actually not only the seibu building next to the tsutaya, but many other places in the city. at a noisy workplace, these sounds can be detrimental to the ear and can cause tinnitus and hearing loss. While some people may adjust to specific shrill and high pitch sounds and not lose concentration, e.g. Instead of hearsay, I wanted a method to measure and prove the device was emitting what some would consider an 'annoying' high-pitch frequency. The human ear is sensitive to a wide range of frequencies but we hear most sounds in the 2000-4000 Hertz range. Recently I purchased a media streamer and the power supply was emitting a high pitch frequency.

Other examples include: Uninterruptible Power Supplies (UPS'), the power supply for your PC or a power adapter for your media streamer. However, when it comes to consumer products that exist in living rooms or bedrooms, consumers who can hear these tones want products that do not emit high-pitch frequencies.

It can be expected for high-performance enterprise HDDs (10-15K RPM) as those generally live in datacenters or separate server rooms. For some people, certain hardware devices such as hard drives (HDDs) and some power supplies can emit a high pitch 'whine' which can be very annoying to the customer.

Annoying high pitch sound app