Decibel Ultra

Ultra decibel measures the volume and helps you figure out how big the noise level compared to the same values. Ultra decibel measures the sound pressure level with built-in microphone in the iPhone 3G, 3GS, iPhone 4, iPad, iPod touch 4G. iPod Touch 2G and iPod Touch 3G users have to use an external microphone, since these devices have no built-in microphone.
Calibrate with Ultra decibels all the surround speakers on the same level.
Ultra Decibel measures the sound pressure level in the logarithmic unit of dB(c).
You want know how loud is your music or your TV? Or is the neighbor again too loud? With Decibel Ultra you know it! Noise can be a potential hazard to your health!
Features:
• Uses different graphics vor normal and retinal displays, optimal for the best Präsentation.
• Display of the average and peak value, and maximum memory for both.
• Really easy and intuitive operation.
• The offset can be set manually at any time.
• Relative measurements are possible any time.
• The sampling rate can be changed any time.
• Two analog display panels.
• histogram curve.
• Clean interface.
Additional features:
• Calibration menu
• Support for 180 degree rotation.
• Each setting is stored immediately.
• Internal and external microphone is supported.
• You can select a alternative analog panel.
• Long- term measurements are possible without sleep.
• Reset button to reset max. values, rate and offset.
• Calibrated values are separated for internal / external microphone saved.
• Calibrated values for the iPhone (3G, 3G, 4) and iPod Touch (2G, 3G, 4G) are integrated.
• REC button to record up to max. 1200 measured points. The measuring point of the record can then copy or send it by e-mail, including date and time format in ISO 8601.
• Help- and Information View in English, German, French and Italian.
-> Is continuously perfected <-
 
 
http://itunes.apple.com/nl/app/decibel-ultra/id410139517

Analyzer

The Analyzer is a combination of a sound pressure level (SPL) meter and a full range multiple bands frequency analyzer. It is mainly designed for audio professionals who need to evaluate different working environments (e.g. studios, live stages)… that’s why it’s perfect for anyone who’s in need of acoustical analysis!! It is easy to use and comes with amazing features only known from professional acoustic tools. 
Use the Analyzer for measuring stages, testing speakers, evaluate sound mixing environments, analyzing your instrument… or the noise your neighbor makes with his new stereo!
Analyzer features:
– select your bandwidth in 7 steps (1/1 to 1/192 octave)
– choose between 5 different window functions
– select your FFT blocksize from 128 to 65536 samples
– automatic peak detection
– touch control scaling of frequency window
SPL Meter features:
– response time modes: impulse, slow, fast
– weighting functions: A B C
– hold function
– mute function
 
http://itunes.apple.com/nl/app/analyzer/id454225351

Sonic Scan

Displays sound pressure level [decibel] and frequency [Hertz] of sound in your environment.
Measure noise exposure in residential areas, at work, inside cars (compare cars), in bed- and livingrooms, near airports, discos, party noise, traffic noise, …
A-weighting for sound pressure level (the most commonly used weighting used to emphasize frequencies around 3–6 kHz where the human ear is most sensitive, while attenuating very high and very low frequencies to which the ear is insensitive).
Support for upside down device orientation (mic towards sound source).
Decibel meter calibration (shift and scale).
Sound pressure ranges from approx. 35 up to 105 decibels.
The real time frequency value displayed shows zero-crossings per second.
Even though Sonic Scan passed tests with professional equipment, Sonic Scan cannot replace professional equipment and should be used for entertainment purposes only.
Keywords: sound pressure level meter, SPL, decibel, hertz, frequency, loudness, dBA, dB, graph, measure, environment, scan, sonic, noise, dezibel, lärm, lärmmessung, lärmmesser, schalldruck 
 

dBMeter Pro

This application measures ambient noise in decibel using the built in microphone of the iPhone and iPhone 3G / 3GS and iPhone4. Apart from a modern and vintage look it also features a reference view showing typical noise producers in relation to the currently measured noise. It can record up to 500 samples, display them graphically and send them via eMail for further analysis.
Disclaimer: Even though the dBMeter Pro Software has been calibrated using professional grade equipment, do no use dBMeter Pro to carry out professional measurements. The author can not be held liable for any damage which might arise by using dBMeter Pro. 
 
http://itunes.apple.com/nl/app/dbmeter-pro/id296264086 

SafeNoise‎

Ongemerkt word je vaak blootgesteld aan harde geluiden en hoge geluidniveaus.
Om je bewust te maken van het gevaar van te hard geluid, is de applicatie SafeNoise voor de iPhone ontwikkeld. Met de app meet je het geluidniveau in dB(A). Je ziet zowel het gemiddelde, als het maximale en momentane geluidniveau. Gelijktijdig geeft de app aan hoe lang je in dat geluidniveau mag verblijven voordat het geluidniveau schadelijk kan worden.
In de app is uitgegaan van de standaard gevoeligheid van de iPhone. De app bevat de mogelijkheid om je iPhone te kalibreren en dus beter af te stemmen op het werkelijke geluidniveau. Je hebt daarvoor wel een geschikte geluidmeter nodig.
Je meetresultaten kun je opslaan in het geluiddagboek en bekijken door middel van grafieken. Je kunt je meetresultaten ook mailen om te verwerken in andere programma’s.
Tip: gebruik geen leestekens in de omschrijving bij je grafiek. Dat geeft rare resultaten. De grafiek software kan er niet goed mee omgaan.
Disclaimer: het gebruik van de app is geheel voor eigen risico. Wij, noch de makers van deze app, aanvaarden op geen enkele wijze enige aansprakelijkheid voor schade die mogelijkerwijs direkt of indirekt ontstaat door het gebruik van deze app.
De maker over het ontstaansidee over de App:

http://www.geluidnieuws.nl/2011/okt2011/ost.html 


http://itunes.apple.com/nl/app/safenoise/id464042309