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Updated Neural Model Operations

Apr 5, 2022

Neural activities generated by Interaural level differences (ILD) and the envelopes of carrier waveforms:

• Instead of treating interaural level and time/phase differences separately (and spending way too much time resolving issues arising from this) I’ve decided to add neural activities generated by ILD and the envelopes of waveforms to the edge model.
• This adds a bit of complexity. For example, neurons responsive to ILD and envelopes cues must be modeled (and documented). Activities evoked by ITD/IPD, ILD, and envelopes must then be combined. On the other hand, activities modeled in this way correspond much better with spatial hearing.

Up Next:

After avoiding it for years, it’s time to finally update my SpHr XOPs for recent MacOS updates and have them approved by Apple…

Then I hope to update web content for ILD and waveform envelope cues. Once this is done I can finally get to analyses of real recordings and things like auditory distance. Wish I had help…

Jun 24, 2021

Added a Disqus comments section. Please add comments, questions, and requests for future content.

Please also consider supporting to this website’s creation and maintenance.

Apr 6, 2021

In the simplest sense, people experience ‘spatial hearing’ whenever they judge the location of a sound’s source. A bird calling from the left. A person speaking from the right. A car passing from left to right. An airplane flying overhead, etc.

Yet, judgments of sound-source direction do not fully capture what most listeners experience under typical listening conditions. The sense of the room within which a person is speaking, for instance. The sense of trees near a calling bird. Ocean waves rolling on a beach!

As for theories and computational models of spatial hearing, numerous acoustic and neural models exist to explain ‘spatial hearing’ in the simplest sense. That is, how listeners are able to judge direction under ideal listening conditions.

The goal of this website, and the edge model specifically, is to propose an explanation for how listeners experience so much more than the sense of ‘direction’ under typical listening.

Spatial Hearing and the Edge Model

Feb 13, 2021

Because I hope to soon begin describing some new aspects of the edge model, I suppose it’s time to start a blog.

Content added to this point has mostly been a rehash of Nelson BS, Donovan JM, Takahashi TT (2015) A Neural Model of Auditory Space Compatible with Human Perception under Simulated Echoic Conditions. PLoS One.