I tried to do this effect for a similar purpose. Not really sure how good it is, but the .nwctxt below will show what I got.
The first 2 bars are just the hammer blow, while the second 2 have my attempt to imply an echo added...
Percussion staff required (channel 10) instruments (top down) are:
Ride bell
Accoustic Snare
Accoustic Bass
Bar 3 changes the Accoustic Snare for a Side Stick for variation in that bar only.
You could also add a splash cymbal (Bass clef G nat - 4th space) to fatten the sound a little. I also experimented with a Chinese Cymbal (bass clef E nat - 3rd space) but wasn't happy with it as it rings too long, ditto crash cymbal (bass clef C# - 2nd space)
If you haven't used the code window before, just click Select, then <Ctrl+C>, go to NWC and |Edit|Paste as new file| (<Shift+Ctrl+V>)
!NoteWorthyComposer(2.751)
|Editor|ActiveStaff:1|CaretIndex:6|CaretPos:0
|SongInfo|Title:"HammerSound"|Author:"<Name>"|Lyricist:""|Copyright1:"Copyright © 2021 <Name>"|Copyright2:"All Rights Reserved"
|PgSetup|StaffSize:16|Zoom:4|TitlePage:Y|JustifyVertically:Y|PrintSystemSepMark:N|ExtendLastSystem:N|DurationPadding:Y|PageNumbers:0|StaffLabels:None|BarNumbers:None|StartingBar:1
|Font|Style:StaffItalic|Typeface:"Times New Roman"|Size:10|Bold:Y|Italic:Y|CharSet:0
|Font|Style:StaffBold|Typeface:"Times New Roman"|Size:8|Bold:Y|Italic:N|CharSet:0
|Font|Style:StaffLyric|Typeface:"Times New Roman"|Size:7.2|Bold:N|Italic:N|CharSet:0
|Font|Style:PageTitleText|Typeface:"Times New Roman"|Size:24|Bold:Y|Italic:N|CharSet:0
|Font|Style:PageText|Typeface:"Times New Roman"|Size:12|Bold:N|Italic:N|CharSet:0
|Font|Style:PageSmallText|Typeface:"Times New Roman"|Size:8|Bold:N|Italic:N|CharSet:0
|Font|Style:User1|Typeface:"Times New Roman"|Size:8|Bold:N|Italic:N|CharSet:0
|Font|Style:User2|Typeface:"Times New Roman"|Size:8|Bold:N|Italic:N|CharSet:0
|Font|Style:User3|Typeface:"Times New Roman"|Size:8|Bold:N|Italic:N|CharSet:0
|Font|Style:User4|Typeface:"Times New Roman"|Size:8|Bold:N|Italic:N|CharSet:0
|Font|Style:User5|Typeface:"Times New Roman"|Size:8|Bold:N|Italic:N|CharSet:0
|Font|Style:User6|Typeface:"Times New Roman"|Size:8|Bold:N|Italic:N|CharSet:0
|PgMargins|Left:1.27|Top:1.27|Right:1.27|Bottom:1.27|Mirror:N
|AddStaff|Name:"Staff"|Group:"Standard"
|StaffProperties|EndingBar:Section Close|Visible:Y|BoundaryTop:12|BoundaryBottom:12|Lines:5|Color:Default
|StaffProperties|Muted:N|Volume:127|StereoPan:64|Device:0|Channel:10
|StaffInstrument|Trans:0|DynVel:10,30,45,60,75,92,108,127
|Tempo|Tempo:85|Pos:11|Placement:AsStaffSignature
|Clef|Type:Percussion
|Key|Signature:F#|Tonic:G
|Text|Text:"Drums"|Font:StaffItalic|Pos:12|Placement:AsStaffSignature
|TimeSig|Signature:4/4
|Chord|Dur:8th|Pos:-9,-7|Opts:Stem=Down,ArticulationsOnStem|Dur2:Whole|Pos2:n2
|Rest|Dur:8th|Opts:Stem=Down
|Rest|Dur:4th|Opts:Stem=Down
|Rest|Dur:Half|Opts:Stem=Down
|Bar
|Chord|Dur:8th|Pos:-9,-7|Opts:Stem=Down,ArticulationsOnStem|Dur2:Whole|Pos2:n2
|Rest|Dur:8th|Opts:Stem=Down
|Rest|Dur:4th|Opts:Stem=Down
|Rest|Dur:Half|Opts:Stem=Down
|Bar
|Chord|Dur:8th|Pos:-9,#-8|Opts:Stem=Down,ArticulationsOnStem|Dur2:Whole|Pos2:n2
|Note|Dur:8th|Pos:#-5|Opts:Stem=Down
|Note|Dur:8th|Pos:-5|Opts:Stem=Down
|Note|Dur:8th|Pos:-5|Opts:Stem=Down
|Rest|Dur:8th|Opts:Stem=Down
|Note|Dur:8th|Pos:-5|Opts:Stem=Down
|Note|Dur:4th|Pos:-5|Opts:Stem=Down
|Bar
|Chord|Dur:8th|Pos:-9,-7|Opts:Stem=Down,ArticulationsOnStem|Dur2:Whole|Pos2:n2
|Note|Dur:8th|Pos:#-5|Opts:Stem=Down
|Note|Dur:8th|Pos:-5|Opts:Stem=Down
|Note|Dur:8th|Pos:-5|Opts:Stem=Down
|Rest|Dur:8th|Opts:Stem=Down
|Note|Dur:8th|Pos:-5|Opts:Stem=Down
|Note|Dur:4th|Pos:-5|Opts:Stem=Down
!NoteWorthyComposer-End