"vibration direction" is a correct and usable phrase in written English.
It refers to the direction in which a vibration or sound wave is moving. Example: The sound of the loud bass from the concert could be felt in different vibration directions depending on where you were standing in the room.
According to the surface selection rule for SERS [51, 52] and the SERS mechanism [53, 54], the enhanced bands in the SERS spectrum might correspond to either the vibrational moieties attached to the surface or the vibration direction perpendicular to the metal surface; in contrast, the intensities of vibrational modes with parallel polarized components to the surface will be decreased.
This situation is relevant in case of cylindrical handles, where the tool can be gripped in different ways independently from the vibration direction.
It is found that the dynamic contact angle of the water droplet varied with the vibration direction and the speed of the substrate.
The vibration direction was always vertical, while the different postures entailed a different stimulus orientation with respect to the hand, forearm and shoulder.
The comparisons show that non-uniform excitation in different wave form, peak acceleration, vibration direction and wave propagation direction may lead to different dynamic response.
The impedance at the palm was greater than that at the fingers below a certain frequency in the range of 50 100 Hz, depending on the vibration direction.
The vibration directions (vertical and horizontal) and vibration parameters (frequency and amplitude of vibration) were changed.
The cone angle, the piezoelectric wafer's resonant frequency and the vibration directions are studied in the simulations.
From the combination of vibration directions, vibration magnitudes, object sizes, object distances and angles of approach, a total of 416 exposure conditions were considered.
Using the Fitts' law, a relation between movement time and index of difficulty was developed for different vibration directions and magnitudes considered in the study.
The vibration directions of the platform are also shown.
