Oscilloscope By ONYX Apps(include tone generator too)

4:42 AM oscilloscope, sound generator, sound meter No Comments

Oscilloscope By ONYX Apps
$14.99
Category: Utilities
Updated: Feb 26, 2012
Version: 1.9
Size: 4.2 MB
Language: English
Seller: ONYX 3 © 2010 ONYX Apps



Requirements: Compatible with iPhone, iPod touch, and iPad.Requires iOS 3.1.3 or later

Description

Oscilloscope for iOS is a powerful digital Oscilloscope & Signal Generator app. Designed to plot audio signals, monitor equipment, analyze events, and test circuits, it is also an excellent learning tool. Its GUI includes many standard oscilloscope controls, such as: triggering, time and voltage per division, signal measurement cursors, and more. The app also incorporates a signal (function) generator capable of generating sine, square, triangle, and sawtooth waveforms of up to 22 KHz. Calibration to an external reference signal is supported, guaranteeing the accuracy of measurements.

Input is acquired via the built-in microphone or a probe connected to the headset connector. For best results one could use an external accessory such as a dock connector audio input device for the iPhone/iPod touch, or USB audio input such as Griffin iMic for the iPad. When connecting external signals via probes, you should take care not to exceed 1V AC voltage. Currently iDevices only support AC input.

Feature Highlights:
* Real-time waveform display (60 FPS)
* Triggering modes: Normal, Auto, Single
* Set trigger level and pre-trigger time
* Built-in function generator
* Reference signal calibration
* Pause function to get a screen capture
* Measure signal data using cursors
* Use "finger pinch" on screen to set voltage and time base
* Double tap screen to enter Black Panel mode
* Four color themes to choose from
* Retina display support

What's New in Version 1.9
- Signal generator switchable to the audio output. You can use that signal to stimulate external circuits and feed their output back into the iDevice input for analysis.
- Performance improvements.

Customer Reviews
Awesome tool 
   
by Madscien
These guys are great. I asked for the audio out so you can study filter circuits and got a dual signal generator! Left and right separately programmable, frequency and wave shape. Great display. This app rocks.

Oscilloscope is like the real thing 
   
by MicroHydroMan

Oscilloscope works right out of the box using the built-in mike for input. For more serious work the USB audio interface via the iPad Camera connection kit is recommended, though I have not tried that yet. The built-in signal (function) generator is useful as you can get audio feedback while viewing the wave shapes. All the controls and adjustments normally found on a scope are nicely integrated into the iPad / Pod / Phone environment. This app certainly costs way less than a comparable o-scope! -Rob-

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Advanced dB/SPL Meter By Darren Gates

4:13 AM Db meter, Decibel meter, sound meter No Comments

Advanced dB/SPL Meter By Darren Gates
$0.99
Category: Education
Released: Mar 02, 2011
Version: 1.0
Size: 0.6 MB
Language: English
Seller: Darren Gates
© 2011 Darren Gates
Rated 4+
Requirements: Compatible with iPhone, iPod touch, and iPad.Requires iOS 3.1.3 or later


Description
This application is an advanced decibel (SPL) meter, with not only the ability to measure environmental sound levels, but also to SAVE those sound levels, with descriptions and time stamps, so that you can reference them and compare them later.

This decibel meter has been calibrated against an actual Extech 407730 Digital SPL meter, using an iPhone 4. If you have another iPhone, or an iPod Touch with an external microphone, you may need to calibrate the app so that it reflects more accurate dB values.

iPod Touch users: An external microphone is REQUIRED for this app to work. iPhone users have a microphone built-in to the hardware.

Features include:

- Graphical screen that shows the dB levels over a short period of time, so that you can compare the relative height of peaks and valleys.

- Six common sound measurements, including: Average, Minimum, Maximum, Peak, Peak Hold, and of course the weighted dB level itself.

- Meter-like screen that shows the dB reading in a display resembling an odometer.

- Settings panel that includes: Weighting (A vs. C), Internal/External mic options, Trim (to adjust to different microphone sensitivities), and sampling rate to sample more or less frequently.

- Save screen allows you to save a "snapshot" of the decibel meter values at any given moment, and even RECORD the ambient sound for later playback. You can later playback the audio sample, input some text describing what was recorded, and save the date/time of the recording. These are limited to about 30 seconds, and you have 10 available recording slots.

Sampling Rate: This lets you change between slower and faster response times. A higher sampling rate yields a faster response time, which can be used to capture sudden peaks. Lower sampling rates give you a steadier view of the changing dB levels. In most situations, a SLOW response time will be more appropriate (smaller sampling rate).

A Weighting vs. C Weighting: C Weighting is used most often in the sound analysis of machinery, car engines, and other noise that has a more consistent sound, whereas A Weighting is used for ordinary environmental noise measurements. The Info screen assumes A Weighting in its values.

The Info screen gives you some sense of what the dB values correlate to in real live. This makes the application more helpful in an educational context.

Comment: apps from the seller not make you disappoint.

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