Notice Regarding the Acquisition of All Shares and Becoming a Wholly Owned Subsidiary of Sonora Technology Co., Ltd.

Why “Dr-45” Isn’t Always Enough – How Door and Vent Design Define Real-World Sound Isolation –

Notification of Specification Changes and Price Revision for Standard Products

How “Silence” Has Been Redefined Over Time – The Evolution of Audiometric Room Standards in ISO 8253 and JIS T 1201 –

Redesigning Silence: How to Succeed with Audiometry Room Renovations – Maximizing sound isolation performance under structural and budget constraints –