Patent Review: Loudspeaker for Eliminating a Frequency Response Dip

Every month on his Voice Coil's Acoustic Patents column, James Croft (Croft Acoustical) discusses different loudspeaker patents and inventions that are relevant to the audio industry. In the January 2015 edition. Croft reviewed a “Loudspeaker for Eliminating a Frequency Response Dip” patent, granted in November 12, 2014 to Harman International Industries, describing “a speaker system that includes a speaker enclosure having a front end, a rear end, and a first transducer. This article was originally published in Voice Coil, January 2015.

Like the previous conference that was held in 2016 in Aalborg, Denmark, the Audio Engineering Society (AES) Headphone Technology Conference in San Francisco, was a very successful and insightful event for all the participants. The Presidio park venue was also idyllic with the usual crisp waterfront weather. Perhaps too successful, as the event was sold out before it opened.

Harman Kardon launched their Citation range of multiroom and multi-channel speakers at IFA 2018, in Berlin. All products are voice activated, featuring a Google Assistant integration and Chromecast built-in developed with StreamSDK software from StreamUnlimited. The collaboration with the Austrian wireless audio development platform specialists allowed Harman to show nine different smart products at the European consumer electronics show in a short period of time.