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May 20, 2020
How do MEMS speakers compare to balanced armature speakers? How do they differ in different aspects? In this free benchmark report, you’ll learn the differences between MEMS speakers and balanced armature speakers in terms of acoustics, mechanics, manufacturing and reliability.
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April 15, 2020
Discover how MEMS speakers compare to electrodynamic speakers (ED) and how do they differ in different aspects. In this free benchmark report, you’ll learn the differences between MEMS speakers and balanced armature speakers in terms of: Acoustics Mechanics Manufacturing Reliability
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February 18, 2020
Compared to traditional electrodynamic and balanced armature Loudspeakers MEMS speakers provide unique features and compelling advantages compared to electrodynamic and balanced armature speakers. The application-specific advantages of MEMS speakers must be separated into two main kinds of applications: Free field and occluded ear applications. In this article, we will focus on the occluded ear applications.…
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February 7, 2020
Compared to Traditional Electrodynamic and Balanced Armature Loudspeakers MEMS speakers provide unique features and compelling advantages compared to electrodynamic and balanced armature speakers.The application-specific advantages of MEMS speakers must be separated into two main kinds of applications: Free field and occluded ear applications. In this article, we will focus on free field applications.We refer to…
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May 9, 2019
The THD peak at ~10 kHz stems mainly from a mode of the MEMS at 21 kHz. When the MEMS is excited with 21kHz it resonates strongly and produces movement and subsequently a higher SPL. Due to small inherent non-linearities in the movement of the MEMS, 10.5 kHz will produce a small frequency component at…
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April 30, 2019
USound specifies and measures Ganymede MEMS speakers, Achelous and Adap, in both acoustic domains: in the Baffle and in the Coupler (artificial ear). For both setups, proprietary measurement adapters are used to fit the standardised setup. In Baffle In the case of the baffle, the measurement adapter places the MEMS speaker with appropriate sealing inside…
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The baffle measurement is standardised in the IEC 60268-5 [1], even though in everyday applications, no baffle is present. So why does the industry rely on this particular setup? There is one main reason: it is universal. The baffle is basically just a massive wall which separates back and front side of the speaker. The…
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April 4, 2019
USound’s technology is based on piezoelectricity. Crystals with these properties are for example aluminium nitride (AlN) or lead zirconate titanate (PZT). These materials expand or shrink in an electric field. In a practical configuration, such an electric field is generated between electrodes, covering a piezoelectric layer. This stack is put on top of a substrate…
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April 3, 2019
The current versions of Ganymede MEMS speakers have two land pads on the backside. They are shaped differently to mark the polarity. There are different ways on how to bring electricity to these contacts: Hand soldering on the pads: It is worth noting, that the speaker is not able to withstand the normal reflow process…
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April 3, 2019
Sealing the front from back side of the speaker is critical to obtain the best acoustic output. This can be achieved by two methods: Glueing the speaker into the application’s housing. In this case, the glue can be applied around the speaker or on the cover. Care must be taken to: Obtain a fully sealed…
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