Supplemental material for the paper "Evaluating Optopalatography Sensor Positions for Silent Command Word Recognition".
Authors: Arne-Lukas Fietkau, João Menezes, Peter Birkholz.
Accepted for publication at the Elektronische Sprachsignalverarbeitung (ESSV) Conference 2025.

Below are the hyperparameter sets which yielded the highest recognition accuracies for each evaluation type and speaker combination.
The search space for each hyperparameter is described in the paper.
If there are any questions or suggestions, please contact the authors.

Evaluation type	 	Speaker		Sensors		Batch size	BLSTM hidden neurons	BLSTM dropout rate

Single speaker	 	SPK1		All		25		163			0.7
Single speaker	 	SPK1		No lip		20		159			0.3
Single speaker	 	SPK1		No lat.		5		188			0.5
Single speaker	 	SPK1		No lip/lat.	10		192			0.3
Single speaker	 	SPK2		All		25		113			0.3
Single speaker	 	SPK2		No lip		20		171			0.6
Single speaker	 	SPK2		No lat.		20		150			0.6
Single speaker	 	SPK2		No lip/lat.	10		192			0.3
Single speaker	 	SPK3		All		5		188			0.5
Single speaker	 	SPK3		No lip		5		179			0.6
Single speaker	 	SPK3		No lat.		5		246			0.4
Single speaker	 	SPK3		No lip/lat.	5		246			0.4
Single speaker	 	SPK4		All		10		192			0.3
Single speaker	 	SPK4		No lip		50		239			0.8
Single speaker	 	SPK4		No lat.		5		113			0.4				
Single speaker	 	SPK4		No lip/lat.	5		246			0.4
Leave-one-spk-out	SPK1		All		5		164			0.9
Leave-one-spk-out	SPK1		No lip      	5		246			0.4
Leave-one-spk-out	SPK1		No lat.		10		204			0.6
Leave-one-spk-out	SPK1		No lip/lat.	20		243			0.7
Leave-one-spk-out	SPK2		All		5		246			0.4
Leave-one-spk-out	SPK2		No lip		20		159			0.3
Leave-one-spk-out	SPK2		No lat.		5		164			0.9
Leave-one-spk-out	SPK2		No lip/lat.	5		246			0.4
Leave-one-spk-out	SPK3		All		5		179			0.6
Leave-one-spk-out	SPK3		No lip		5		188			0.5
Leave-one-spk-out	SPK3		No lat.		5		179			0.6
Leave-one-spk-out	SPK3		No lip/lat.	10		204			0.6
Leave-one-spk-out	SPK4		All		5		164			0.9
Leave-one-spk-out	SPK4		No lip		5		179			0.6
Leave-one-spk-out	SPK4		No lat.		10		192			0.3
Leave-one-spk-out	SPK4		No lip/lat.	10		121			0.3
Multi-speaker		All		All		10		218			0.9
Multi-speaker		All		No lip		10		121			0.3
Multi-speaker		All		No lat.		20		153			0.6
Multi-speaker		All		No lip/lat.	20		250			0.3