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Old 25-03-2020, 01:55 PM   #1
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Cheap Directional Speaker?

Need some recommendation from audiophiles experts.

My mum had some slight old-age hearing issue, and she has been a couch potatoes.
Watching her Channel-8 drama and news inside her bedrooms..

Recently, we received complaints from above floor neighbor that my mum would switch her tv volume much higher, and it disrupt them from the bedroom windows.

I had heard of directional speaker when sound wave is directed onto a spot location in which blindspots remain quiet.

We tried standard satellite speakers closer to bed, but the "surround" effect very un-natural.

Is there something I could buy to add-on to TV and maintain peace with neighbors?
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Old 25-03-2020, 02:19 PM   #2
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Wireless Headphones...
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Old 25-03-2020, 04:34 PM   #3
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Well Amir has measured the Klipsch horn tweeter to be highly directional
https://www.audiosciencereview.com/f...-review.12138/

Jokes aside, directional speakers exist and their theory and implementation are the same as directional antenna systems.

JBL paper on CBT (constant beamwidth transducer / technology)
https://adn.harmanpro.com/site_eleme...7_original.pdf

Audio Artistry CBT36
http://www.audioartistry.com/brochur...nts%20v8.1.pdf

Put simply, putting speakers (or antennas) in a line array causes beamforming (google for details). The response will be strongest at the middle of the array. Similarly, when you put speakers in a circle, then the response will be strongest at the middle of the circle.
Note that in the case of a line array, the directivity will only be limited on the vertical axis. Horizontally the sound is still the same. Hence the circle arrangement is needed.

As you can expect, it is not a mainstream product. Yamaha does use this technology in their soundbars tho, to shoot the beams and reflect them off the wall to create surround sound effect.

If you don't like headphones, you can use neck speakers like Sony SRS-WS1 or Bose SoundWear or Samsung S-Ray
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Last edited by wwenze; 25-03-2020 at 04:36 PM..
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