Sonic Alert Sonic Bomb review

The Sonic Bomb is the clock most deaf and hard of hearing buyers start with, and the vendor's pages explain why. It combines a 113 dB alarm, flashing red lights and what Sonic Alert calls its strongest bed shaker, so you can wake to vibration alone, sound alone or both. The user guide shows two alarms, an alarm that keeps going for 1 to 59 minutes, a snooze you can set from 1 to 30 minutes and a test mode that lets you check the shaker before bed. A 9-volt battery keeps it working in a power cut, though you buy that battery yourself. The display has five brightness steps, which matters if the red digits keep you awake. When we checked, sonicalert.com sold it for $44.99 against a $72.99 list price, with free shipping and 30-day returns. The main limits are practical: it needs mains power and the shaker hangs off a cable.

Who it is for

Very deep sleepers and people with severe hearing loss

Price

$44.99 on sonicalert.com when checked (list price $72.99).

$72.99 . Final price: $44.99
Quoted from the vendor pricing page on November 12, 2026.

Key features

• 113 dB alarm with adjustable tone and volume
• Bed shaker plugs into the clock and goes between the mattress and box spring
• Flashing red alert lights that can be switched on or off
• Two alarms, with sound, vibration or both
• Alarm duration adjustable from 1 to 59 minutes and snooze from 1 to 30 minutes

Strengths and weaknesses

• Strength: Shaker, strobe and sound in one clock, so it covers profound hearing loss
• Strength: Takes a 9-volt backup battery for power cuts
• Strength: 5-level display dimmer for a dark bedroom
• Weakness: Backup 9-volt battery is sold separately
• Weakness: Needs a wall outlet and a cable to the bed shaker
• Weakness: The wake mode you pick applies to both alarms

Key facts

• Alarm volume: 113 dB
• Alarms: 2
• Wake modes: Sound, bed shaker, both, plus strobe
• Backup power: 9-volt battery (not included)
• Warranty: 1 year limited

Where it ranks

Sonic Alert Sonic Bomb is No. 1 in our Best Vibrating Alarm Clocks verdict.