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Transcend introduces copy-protected memory cards

13.01.2013

Transcend Information announced the release of copy-protected SD and microSD memory cards. The features of these media include the presence of copy-protected and freely copied zones, CD-ROM emulation, configurable media protection, excellent compatibility and high performance. Transcend says this makes Copy Protection SD and microSD cards ideal for use in OEM applications and media distribution.

The media can be useful for publishers of sound and video recordings, as well as educational institutions that want to distribute educational material to students. They protect intellectual property by allowing access to data but preventing unauthorized copies from being made.

The space left after writing files that should be copy-protected can be used by the end user at their discretion, just like on a regular SD card. When protected data is deleted, the space previously occupied by it also becomes available. Another possible use case is to completely disable writing to the card.

To protect data, the cards are available with a dedicated Transcend RDF5 USB 3.0 writer/reader that acts as the only key that can unlock the card.

For additional protection, Transcend Copy Protection SD and microSD cards can be ID-bound to a specific device, after which they cannot be used normally with other devices.

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Microphones inspired by insects 09.05.2023

What can an insect hear? Oddly enough, quite a lot. Although they are small and simple, their auditory systems are very effective. For example, with a membrane only 2 millimeters across, the Desert Locust can decompose frequencies comparable to human capabilities. By understanding how insects perceive sound and using 3D printing technology to create special materials, miniature microphones inspired by biotechnology can be designed.

Andrew Reid from the University of Strathclyde in the UK presented his work on microphones that can autonomously collect acoustic data with low power consumption. His presentation "Unnatural Hearing - 3D Printing of Functional Polymers as a Pathway to Biotechnology-Inspired Microphone Design" took place on Wednesday, May 10, as part of the 184th Acoustic Society of America meeting.

"Insect ears are ideal templates for reducing energy and data costs, reducing the size of sensors and eliminating data processing," Reid said.

Reid's team draws inspiration from insect ears in a variety of ways. At the chemical and structural levels, researchers are using 3D printing technology to fabricate special materials that mimic insect membranes. These synthetic membranes are highly sensitive and effective as acoustic sensors. Without 3D printing, traditional silicon microphones lack flexibility and customization.

"In the images, our microphone looks like any other microphone. The mechanical element is a simple diaphragm, perhaps a slightly unusual ellipsoid or rectangular shape," said Reid. "Interesting details occur at the microscale with small variations in thickness and porosity, and at the nanoscale with variations in material properties such as ductility and material density."

More than just material, the entire data collection process is inspired by biological systems. Unlike traditional microphones that collect a range of information, these microphones are designed to detect a specific signal. This simplified process is similar to how nerve endings detect and transmit signals. The specialization of the sensor allows it to quickly recognize triggers without consuming much power or requiring supervision.

Bio-based sensors, with their small size, self-contained function, and low power consumption, are ideal for hazardous or hard-to-reach applications, including locations embedded in structures or inside the human body.

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