SpeakerDraft gains Universal status

News

Faber Acoustical is pleased to announce that SpeakerDraft 1.2 is now available for download on the iTunes App Store. Version 1.2 brings a few important enhancements, as well as compatibility with the iPhone and iPod touch. New in version 1.2: SpeakerDraft now runs on all iPhone OS devices, including the iPhone and iPad Driver properties now include nominal diameter (in inches), nominal impedance, and mounting depth. Box dimensions are constrained by the size of the driver (you can’t make a box that’s too small for the selected driver). Port dimensions are constrained by the size of the box. Some cosmetic issues have been corrected in the iPad version. SpeakerDraft 1.2 also brings with it a new, lower price. Happy subwoofer […]

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SignalScope 2 for iPhone offers upgrades via in-app purchase

News

Faber Acoustical, LLC announced today that SignalScope 2.0 for iPhone and iPod touch devices is available for immediate download on the iTunes App Store. With version 2, SignalScope users can now enjoy the full features of the Pro version without having to pay full price for SignalScope Pro. Faber Acoustical’s SignalScope 2.0 includes full and partial upgrades, via in-app purchase, that unlock additional tools and functionality, which previously were only available in the Pro version. In addition to enabling users to upgrade to the full functionality of SignalScope Pro for iPhone all at once, SignalScope 2.0 offers incremental upgrades. Available upgrades include individual tools, such as the level meter (functionally equivalent to the sound level meter tool in the popular […]

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iPod Touch 3G Headset IO Frequency Response

iPhone

To add to the previously published results, we decided to measure the frequency response of the iPod Touch 3G. Electroacoustics Toolbox 2.1.7 was used with a MOTU UltraLite mk3 audio interface to measure the frequency response. These measurements include the response of the headset output as well as the headset input. The audio was routed through the iPod Touch using SignalScope Pro, and the measurements were made on a 3rd generation 32 GB iPod Touch. With each new iteration of the iPhone, the low-end roll off of the headset input has been steeper and steeper.  The iPod Touch seems to be following a similar trend. The iPod Touch 2G had a 3 dB frequency around 30 Hz while the iPod […]

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Frequency Response Measurement of Logitec LIC-iREC03P

iPhone

There haven been a few requests regarding a recently released line input device called the Logitec LIC-iREC03P. To add to the frequency response measurements done previously, we decided to add this new device to the group. This measurement was made using an iPod Touch 2G. As before, the audio was routed through the phone using SignalScope Pro, and the measurement includes the response of the iPod’s headphone output. When compared to the previous measurements,  the Logitec has the lowest 3dB point of all the devices tested (around 5 Hz). One problem with this device is the availability. Currently, it appears to only be available from Japan. I was able to order it fairly painlessly from geekstuff4you.com, but your mileage may […]

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Measuring Loudspeaker Impedance with IOScope

iPhone, iPhone Tutorials

Today, a new video, Measuring Loudspeaker Impedance with IOScope, was published on this site, as well as on the Faber Acoustical YouTube channel. The video is both a demonstration of IOScope, as well as a simple tutorial on measuring loudspeaker impedance. Although the video is largely self-explanatory, I thought it would be beneficial to include some further explanation and tips for those who are interested. The movie is essentially broken into four chapters and a similar format will be followed here. What is impedance? How is it measured? By a generalized version of Ohm’s law, we understand that voltage is equal to the product of electrical current and impedance. This means that electrical impedance is equal to the ratio of […]

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iPhone Microphone Frequency Response Comparison

iPhone

With the advent of sound level meter apps for the iPhone OS (of which SoundMeter was the first) people began to ask, “How flat is the frequency response of the iPhone’s microphone?” Early testing indicated that the built-in microphone of the original iPhone was not a good candidate for sound level measurements, but that the iPhone’s headset microphone enjoyed a fairly flat response. Since then, additional iPhone models have arrived on the scene, each with its own set of weaknesses with respect to microphone frequency response. Additional Apple and third party headset microphones have also been introduced. At long last, some relevant frequency response measurements are presented here for the benefit of those who would really like to “see” how […]

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