Re: [AUDITORY] Seeking advice on using ANF firing rate to reslove front-back confusion in sound localization model

Subject: Re: [AUDITORY] Seeking advice on using ANF firing rate to reslove front-back confusion in sound localization model

From: Qin Liu <000003c563e12bd3-dmarc-request@xxxxxxxxxxxxxxx>

Date: Mon, 3 Mar 2025 10:44:09 +0000

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Comments: To: Sathish Kumar <sathish.sreeni58@xxxxxxxxx>

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Thread-topic: Seeking advice on using ANF firing rate to reslove front-back confusion in sound localization model

Dear Sathish,

Thank you for your warm response, and I apologize for my delayed reply.

Your understanding is correct. Currently, I can only predict whether the sound source is in the front or back hemifield.

Could you please suggest any models or papers that I can refer to, which detail how to incorporate cross-frequency cues to accurately determine or classify whether a sound source is in front or behind?

Thank you very much for your help.

Best regards,

Qin

From: Sathish Kumar <sathish.sreeni58@xxxxxxxxx>
Sent: Wednesday, 26 February 2025 13:35:31
To: Qin Liu
Cc: AUDITORY@xxxxxxxxxxxxxxx
Subject: Re: Seeking advice on using ANF firing rate to reslove front-back confusion in sound localization model

Dear Qin,

I agree with Prof. Jan Schnupp that some pre-assumptions are necessary for your problem. In one of my research projects, I simulated the auditory nerve responses of spatialized signals using the zillany2018 model, and their Direction of Arrival was estimated using the dietz2011 model. However, I found that the responses were interpretable only for fine structure data, not envelopes.

From my understanding, the Dietz model considers only sound sources within the frontal hemifield. For front-back localization, you could use cross-frequency integration to detect the high-frequency attenuation caused by the pinna, allowing you to determine whether the sound source is in front or back hemifield. This can then be followed by the Dietz model to estimate the DoA, as ITD and ILDs are nearly identical for front and back azimuths.

Best regards,

Sathish Kumar

PhD Research Scholar

Department of Audiology and SLP

Kasturba Medical College (MAHE), Mangalore

Mob: 9789447666 || E-mail: sathish.sreeni58@xxxxxxxxx